I love Perkins as much or more than anyone... but it he's the first or second option on a team, that team's winning fifteen games.
10 rebounds, no problem. If he's playing 35-36 minutes, that happens almost automatically. The points? 15-16 would seem to be a reasonable upper limit, the big men who can consistently score 20-ish PPG even on bad teams have much more of an offensive game. I mean, Big Al's not even scoring 20PPG this year on a bad team, and we all know how good an offensive player he is.