Latest / The Copywriting Podcast with Fexingo: Sales Letters, Headlines, and Persuasive Writing / How a Testimonial Written by the Customer Outperformed the Agency Version
Transcript
- Lucas: Okay, I want to start with two versions of the same testimonial. Version A was written by a professional copywriter at a B2B software company's ad agency. Version B was written by the customer himself, on a napkin, after a few beers at a user conference. Luna: I feel like I already know which one I'd bet on, but tell me the numbers. Lucas: Version A went into a lead-generation direct mail piece — a letter inviting IT managers to a free trial. The copywriter crafted a neat, polished paragraph: 'The software streamlined our workflow by 40 percent and reduced manual data entry errors significantly. Our team adoption was seamless.' All perfectly grammatical, all very professional. Luna: And Version B? Lucas: The customer — a director of operations at a mid-size logistics firm — wrote: 'Honestly, I was skeptical. But after two weeks, I couldn't imagine going back. My team actually likes using it. The errors dropped so much I stopped worrying about Friday close.' He scrawled it on a cocktail napkin, handed it to the sales rep, and said 'Use that if you want.' Luna: And they tested it? Lucas: They did. Split the same list of five thousand names. Version A in twenty-five hundred envelopes. Version B in the other twenty-five hundred. Version B generated 62 percent more qualified demo requests. The napkin beat the agency. Luna: Okay, that's a huge difference. But I'm wondering — was it really the words, or was it the specificity? The napkin version had concrete numbers and a timeline: 'after two weeks', 'errors dropped so much'. Lucas: That's part of it. But I think the bigger factor was the voice. The agency version sounded like it was written by a committee — and it was. The customer version sounded like a real person talking to another real person. He used contractions. He admitted skepticism. He said 'actually likes using it' instead of 'adoption was seamless'. Luna: There's a reason 'seamless' shows up in every other vendor testimonial. It's a red flag for me as a buyer. It feels like marketing speak. Lucas: Exactly. And that's the tension. Copywriters are trained to polish. We clean up grammar, we make the language flow, we remove the awkward pauses. But in doing that, we often strip out the very thing that makes a testimonial persuasive: the speaker's authentic voice. Luna: So what's the lesson here? Should we just hand a napkin to every happy customer and hope for the best? Lucas: I mean, that's not a bad starting point. But the systematic approach is: capture testimonials in the customer's own words, ideally recorded and transcribed, and then edit only for clarity — not for polish. Keep the 'ums' if they sound human. Keep the self-doubt. Keep the specific detail that only that customer would know. Luna: I've seen a study — I think it was from a B2B marketing agency — that showed testimonials with specific numbers outperformed generic ones by something like 40 percent. But the number had to be believable. 'We saved 100 percent' actually decreased response. Lucas: Right. People smell exaggeration. The napkin testimonial said 'errors dropped so much I stopped worrying' — that's not a precise percentage, but it's a real emotional outcome. The copywriter's version said 'reduced errors significantly', which is vague in a different way. It's corporate vague. Luna: And 'significantly' is one of those words that triggers skepticism. Every vendor says 'significantly improved' or 'significant ROI'. It's become noise. Lucas: So part of the win for the napkin version was that it avoided all the noise words. It also had a narrative arc: skepticism, then adoption, then relief. That's a mini-story. And stories stick longer than feature lists. Luna: I'm curious about the medium. This was direct mail. Would the same effect hold on a website or a landing page? Lucas: Probably even more so. On a landing page, you have seconds to earn trust. A testimonial that reads like a real human said it can do that faster than a polished quote. I've seen tests where a slightly grammatically messy testimonial outperformed a clean one on a sales page by 30-plus percent. Luna: So the advice is: resist the urge to 'fix' the customer's words? Lucas: Resist the urge, yes. Or at least test both versions. The agency in this case was lucky they even ran the test. Most agencies would have just run with their own copy and never known the napkin was better. Luna: And that's the real lesson, right? We assume professional polish is better, but the data keeps showing that authenticity — real human voice — wins. Lucas: It's humbling. I've rewritten customer quotes for years, thinking I was helping. Now I wonder how many campaigns I actually hurt. Luna: Speaking of helping — I want to mention something quick. This show, like all Fexingo Business podcasts, is completely ad-free. We don't run sponsor spots or sell your listening time. And that's a choice we make deliberately. Lucas: Yeah, it's a choice that depends on listeners who find value here. If these conversations have ever given you an idea you used in your own work — a headline, a testimonial approach, a direct mail trick — and you want to support keeping this ad-free, there's a simple way. Luna: It's buy me a coffee dot com slash fexingo. That's it. No tiers, no perks, just a way to say 'this matters to me.' And it genuinely helps us keep the typewriter rolling. Lucas: Alright. Back to the napkin. So the company that ran this test — I won't name them because the data is from an internal case study they shared at a conference — they actually changed their testimonial collection process afterward. Luna: What did they do differently? Lucas: They started sending sales reps with a simple voice memo app after customer calls. Instead of asking for a written quote, they'd say: 'Can you just tell me in your own words what the biggest change has been?' Then they'd transcribe that, clean up only the filler words, and use it raw. Luna: That's smart. It removes the pressure of writing. People talk more naturally than they write. Lucas: Exactly. And the results? Their next campaign, using only customer-voice testimonials, pulled a response rate that was 2.3 times their historical average for direct mail. Not a controlled test this time, but still eye-opening. Luna: So the napkin method scales. You just need a microphone and a willingness to leave the customer's words alone. Lucas: And one more thing: they also started including the customer's job title and company name more prominently. That added credibility. The napkin testimonial originally didn't have attribution — just the quote. Adding 'John D., Director of Operations at XYZ Logistics' boosted response another 18 percent. Luna: So the combination is: authentic voice plus specific attribution. That's a formula I'm going to steal. Lucas: Please do. And if you test it, let us know. We'd love to hear what happens.