I think it's almost all laziness from fatigue rather than attitude at this point, evidenced by the fact that he shows flashes of tremendous effort rebounding now, while in January he would start running back when the OTHER team put a shot up. The NBA scouts are going to tell him to go back to school for one more year and lose the fifty pounds, and if he heeds that advice, I strongly believe he'll average a double double in points and boards next year. As for his defense, I don't think it will improve before his career with us is over due to lack of teaching on fundamentals in high school/AAU and no help when he got here, but hopefully we'll be able to mask it better next year with Moultrie moving into the center role defensively and taking some of the responsibility off him.
May I also add that it's heartening to see an intelligent and objective discussion on Sidney for once? I'm hard-pressed to remember another player who was dismissed as worthless and a waste of time while giving his team 14 points and 8 boards per game, despite the obvious flaws, as much as Sidney is on here.