I'm not sold on this kid at all.
He doesn't seem to have much intensity, and he can't rebound worth a lick. He's not that aggressive on the boards. He grabbed 7 rebounds last night, but they were moreso accidental. He really struggles to box his man out and just go up and get it. Dwight Howard would absolutely shat on this kid.
7 'accidental' rebounds ... in just 21 minutes.
It's early in the season (He's only played a total of 70 minutes) but Stiemsma's DRB% is 20%. His per-minute rate is 8.7 total rebounds per 36 minutes. Hard to see how you get to those numbers - along with 6.2 blocks per 36 - by being 'timid'.
Right now, Stiemsma has, BY FAR, our team's best individual Defensive Rating at just .98 points per possession (even KG, the god of this stat, is still up at 1.04 ppp).
In other words, our defense so far has only looked like last year's league-leading defense when Stiemsma's been on the floor.
Maybe if he scowled more, that would show the proper 'intensity' that you need from him in order to be 'sold'.