Alex is obviously pointing to the verbal minority (of which he is a part), because for every person out there that speaks out against, say, the Tweetdeck AIR app; there are probably millions that are satisfied with it and in fact prefer it to the native alternatives (that don't have columns, even though they might be native).
The problem with listening to the verbal minority is that you're then building for the verbal minority, and not the bulk of your true user base.
Startups are all about priorities, right? And logically you should prioritize things that will materially affect your business (such as stability) over things that aren't real problems but get written up anyway. EDIT: I mean, he did leave Campfire because of a stability issue, even though there's a native app for it ;-)