Oden has relapsed a bit offensively. Before the energy, he really had a rhythm, and was making his little hook shot, now when he gets the ball under the hoop, it looks like he has cinder blocks tied to his feet all of a sudden.
A big reason Oden cleans up in "garbage time" is because referees stop calling him for ticky-tack fouls. While the competition is not as fierce at that point, I think Oden would do a lot of that in normal play, too, if the officiating were the same as he sees in garbage time.