Have any noted "free market, deregulation" advocates changed their tune?

Thanks for the DeLong links. From 10/23’s entry, he links approvingly to ThinkProgress’s Cox, Greenspan, Snow Agree: Freddie Mac And Fannie Mae Did Not Cause The Financial Crisis, which says:

Harking back to my post #85, that’s not to say that Fannie/Freddie weren’t contributing factors, but simply that they do not bear the majority of blame.