Stats wise, Perk is averaging 8 points, 8 rebounds, close to 2 blocks, and is shooting 56%. He's also a very good and very physical defender, and he's cut his fouls way down. He's a very effective center.
(Those numbers, for instance, are better than Sam Dalembert's -- who is seen as a pretty good center -- and they're better than any big man taken in the 2003 draft other than Bosh, West, and Kaman.)