Some worry that this is a sign of poor economy because lawyers are risk-adverse. However, I disagree. As Alan Murray implies, we can't make blanket statements based on people's degree/previous-occupation. Excellent lawyers may very well be risk-adverse, but not all lawyers are so - certainly not ones that took off their lawyer suits to try on Fortune 500 CEO suits.
I'd be interested to do some more research and find out how successful these ex-lawyers are as CEOs.