you weren't really around either the last couple month
well i guess everybody did "grow up" a bit. when i was at school i could post 5 projects a week i was trying to do. But nowadays i work on 3 projects a year but they are huge. Most of the time i cant even post about my problems because mostly i had to reveal what it was and i cant since i have signed an NDA and im sure a lot of people are in the same dilemma.
The other aspect im sure is the exponential social thing that :
the more people there are, the more people come. You can see this when you play games online(Like battlefield). When you join a server that is full people just drop in and out like crazy. The moment someone exits another joins. But if for some reason if 6-7 people exit the game nobody comes for a couple of minutes, even more people leave. And within 15 minutes its just 5 guys in a 32 player server. Then everybody exits. I have no idea what this is called. But im sure if 10 people would make 1 post a day. Then even more people would come and answer and it would start a roll. People that are passive active (just watching) would join in again.