I love the fact that these kids take it to the rim with bad intentions. I think it was Charles Barkely that said "dunking was partially a mental skill" meaning that most guys at the pro level have the physical ability to dunk and dunk well, but to dunk on someone or in traffic is a mental committment.
I don't recall Chris Weber ever settling for a lay-up when he played at Michigan, he took the ball up strong with the intention of dunking regardless of who was defending him. Reggie Evans is the last Iowa player that remotely comes close to that in my opinion.