I started typing something, then realized it was based on someone's claim in a forum discussion and I hadn't bothered trying to verify it.

It turns out that the information was exaggerated in such a way that, had I not bothered verifying, I would have updated much more strongly in favor of the efficacy of an organization of which he was a member. I got suspicious when Google turned up nothing interesting, so I checked the web site of said organization, which included a link to a press release regarding the subject.

Based on this and other things I've read, I conclude that this organization tends to have poor epistemic rationality skills overall (I haven't tested large groups of members; I'm comparing the few individual samples I've seen to organization policies and strategies), but the reports that they publish aren't as biased as I would expect if this were hopelessly pervasive.

(On the off chance that said person reads this and suspects that he is the subject, remember that I almost did the exact same thing, and I'm not affiliated with said organization in any way. Is there LW discussion on the tendency to trust most everything people say?)