I don't know if they're flouting it as "impressive" so much as "This is a fact that is not true for many other start ups."

You don't think it's impressive? Go do it. I believe these guys are profitable with a headcount of 20-30 people (many of whom are content moderators). They've presumably built an ad-sales machine that works, a moderation machine that works, and build some fairly sophisticated custom software as well as the business analytics software behind it to measure/improve their sites. They've also built a "market testing" machine where they launch speculative blogs and measure their success/viability.

These guys have a GREAT growth curve and healthy margins- rare in the content world. Heck, look at Reddit. Great company, soaring page views, barely profitable.

I'm sure you're similarly unimpressed with Yelp? Threadless? Digg? Reddit?