^Probably. Diaw's never been particularly gifted on the boards.
He's getting to be an overrated defender, too, actually -- he can defend 3-5, but he's a smart defender, not a particularly gifted one.
The thing that Diaw is that Olynyk is not (at this point) is a three position mismatch, because he can post up defenders smaller than him, draw larger ones out to the three point line, and pass the ball well enough from either position to be an effective member of the offense from 25ft in.
On the flip side, it's unclear if Kelly can guard anyone, if he can actually make the three, or if his post game will improve to the point that its considered a weapon. Oly could be Diaw 2.0, though, for sure -- and it would be awesome if he was.
here's a good read on Diaw that went up today on NBA.com
http://hangtime.blogs.nba.com/2014/06/11/diaw-finally-finds-comfort-zone/