I don't have any numbers to back this up since it's just a feeling I've been having. But it seems like the rate of new frontpage-worthy stories has slowed down. This might be because those who visited for YC's winter cycle left, since posting on News.YC was an incentive to get accepted.
If it has slowed down then that's very odd. This is a great community. I'd be interested to see the daily page view counts / submission counts over the last month or two.
Shawn