How many of the players who transferred in the KF era had great careers? The only one I can think of is Bennie Sapp.
All due respect, posting a .gif of Benny getting burned in the NFL completely reinforces the OP statement. Any player that makes it to the NFL has had a "great career" by college standards. It's an enormous accomplishment to make to the NFL at all, and Benny has been a starter for a few years now.