This is what I've seen talking to startups. Lots of seed round companies needing to build up a team fast to try to secure a series A before it's too late. Most of them completely insane (with occasional good ones in there) with ideas that clearly have no reasonable profit model.

It's undoubtably a great time for startups to get talent, but startups as we know them today tend to be very hungry for VC money, which is drying up rapidly. I would be very hesitant to join one unless the match was really good.