My experience is only limited to the Ivy League but, as far as the North goes, the Greek system (again, with the exception of those crazy co-eds) was pretty fratty. There definitely weren't gelheads at any of the chapters at my undergrad, and the members were the guys who would dress up for football games and there were a lot of legacies to fraternities like Sigma Chi. There is a LOT of "going back," as Homecoming is almost exclusively Greeks and not that many independents come back to campus.
I don't know if that's a byproduct of the general exclusivity of Ivy League schools, but there you have it. We've got some fratties up here, too.
