Puzzling thread. Yes, Garnett didn't board like he used to. He couldn't, as some have pointed out, in large part because his legs weren't what they used to be.
What many seem to be missing, though, is that the other parts of his defense were stellar and play a large part in why he needs so much athleticism to rebound. I'm seeing people in here talk about boxing out, and desire, and how KG used to be able to outjump people so he didn't develop fundamentals. But in order to be good at boxing out, you have to turn your back on both your man and the other offensive players before the ball even goes up and start working yourself into position to catch the carom earlier. KG doesn't do that...in most cases, he can't.
Because the way that KG plays defense, he faces up on his man and keeps his eyes on the help defensive rotations through the entire possession. He also often hounds his own man and/or helps on defense out to the 3-point line. This is part of what makes him such a lock-down defender and defensive anchor, but doing this leaves less time to prep for defensive boards and requires that he cover more ground to get there. Now, in his prime this didn't matter because he was so ridiculously long and athletic that he could start late and out of position and still vacuum in the boards. Last season without his quick-jump abilities, he couldn't do that to the same level.
But the weird part of this thread is that so many seem to be blaming KG for the lack of boards without crediting him for the defense. The Celtics defense was lock-down in '08, struggled in '09, and was lock-down again in '10. Not coincidentally, the lock-down years all corresponded to KG's presence.
Likewise, through 3 full rounds and 5 Finals games (harder to calculate for the last 2 games with different rotations) KG's individual assignments (Beasley, Jamison, Lewis and Gasol) were averaging a combined 9 points/36 minutes on 36% FG in 523 minutes when KG guarded them and a combined 21 points/36 minutes on 53% FG in 234 minutes against the Celtics when KG wasn't guarding them. I think it's safe to say that KG's defensive effort went beyond good into absurd in the postseason.
Yes, the ideal would be for KG to lock up his man, play the best help defense in the NBA, then clean the glass. He could do that in his prime. He could do it in '08. Who knows, if his knee really was still healing maybe he'll be able to do it again in '11. In '10 he was only able to consistently do 2 of those 3 things, but he still did them at historic levels and was quite probably the best defensive player in the NBA at any position in the postseason. I mean, I'd like more, but really...I think he did his job. With his physical limitations, he gave up some on the boards in exchange for the defense...I can't really say that was a bad exchange.