Why is it "inane logic"?
Are you suggesting that he might not retain that rate if he played more minutes?
Consider the games where he has played at least 15 minutes:
7/10 NZ - 16 minutes, 3 rebounds
27/10 Cairns- 15 minutes, 5 rebounds
6/11 Illawarra - 15 minutes, 7 rebounds
11/12 Sydney - 17 minutes, 10 rebounds
In those games, he averaged 15.9 rebounds per 40 minutes (25 rebounds in 63 minutes). That's *higher* than his season average of 15.2.
For some comparison, look at some other big name big guys:
Nate Jawai- 8.5 rebounds per 40 mins.
Alecs Maric- 10.3 rebounds per 40 mins.
Cam Bairstow- 12.4 rebounds per 40 mins.
AJ Ogilvy- 11.3 rebounds per 40 mins.
Those guys play 17,19, 21 and 24 minutes per game, which is not so much greater than Williams' 10.5 minutes that it makes a comparison impossible.
In any case, Williams' rebounding rate is *significantly* higher than any of those guys.
Point is 1. Williams is a good rebounder. And 2. He's very valuable to Melbourne United with Dave Andersen out.
So, much maligned as he is, he does contribute something valuable.