There's nothing interesting at all really - the 30 under 30 is not about achievement, but rather a certain measure of social status. And as startups have become

There's nothing interesting at all really - the 30 under 30 is not about achievement, but rather a certain measure of social status. And as startups have become the new cool thing to do, so it is reflected here. In other words, you're observing the same variable. It'd be like saying "interesting how many of these have high Twitter follower counts".