I remember him saying Business Schools are good at making MBAs that help you run a business well. They should do that and leave cultivating entrepreneurship to folks like YC. But I see that argument in line with this article's data. These MBAs are trained to get things like M&A right, so getting them onboard might be the right thing to do and does not necessarily indicate another crash.
No way can I parse 10 hours of PG video. Just rewatched the Calacanis interview and some of Charlie Rose. I vividly remember him speaking about the study, but can't remember if it was an interview or just a speaking engagement (possibly Pycon 08).
Here is him talking about MBA's whipping their meek rent-a-programmers during the interview[0] which is the best I can do. If anyone remembers what video it is in, or better yet, actually knows the (i believe harvard business school) study, would be super interested.