maybe that's another reason that the mean age for founders is quite low. I mean if you're older and have dependents it's not the best time to throw your salary out the window and go it alone.
http://blog.checkadvantage.com/2011/02/09/baby-boomers-job-m...
But I think you're right. MOST younger folks have no obligations. Relatively few older folks have actually managed to keep their burn rate low and accumulate wealth.