Yes, it's still relatively early. But you can't just ignore that right now the Celtics as a team are giving up 100.8 points/100 possessions...a better mark than they posted either of the last 2 years with a fully healthy and playing well Perkins. Their defense isn't struggling, and without a strong argument on that side of the ball Perk doesn't really have a leg to stand on IMO.
I don't think that number is telling, because for large portions of both of those years we haven't had a healthy KG. That is certainly going to skew the numbers.
In 2008-2009 in particular our defensive efficiency dropped once KG was gone. KG went out Feb. 19, you can see the effect on our defense.
October 85.71341627
November 99.87801438
December 100.1017333
January 103.8574922
February 104.0817343
March 106.2900546
April 111.6771004
In 2009-2010 I don't recall exactly when KG started to get gimpy again. Based on his splits and memory I want to say it was during the west coast trip at the end of December:
October 90.42708887
November 102.3632006
December 101.9087903
January 105.6806637
February 105.0151544
March 105.1938334
April 114.9500265
I think those splits speak for themselves, whether or not KG is moving around well is the key to our defense. I don't think we can conclude that Shaq is just as effective as Perkins defensively, not when he's surrounded by such a strong unit for the majority of his minutes and a healthy KG.
Of course given the minutes both play their impact is also somewhat distorted, Perkins is able to be on the court for longer stretches.
1) First, I've been meaning to ask you for awhile now...where do you get your wonderful numbers? You often have splits that I've wanted and/or had to try to calculate myself, so I'd appreciate if there's a site that has it available.
2) I think we're essentially making the same point, but drawing different conclusions. My point wasn't that Shaq is as good on defense as Perk. My point was that Perk was secondary to the defense, and that the main cog there is KG. And that with a healthy KG, we can have an elite defense even without Perk. As such, Perk's added defensive utility is essentially diminished returns when compared to the improvements on offense that Shaq provides
without really hurting the defense. He doesn't have to be as good on defense as Perk for the team to be better served with him out there. If Perkins was the difference between our defense being elite and it being average, then yeah, you deal with his offensive shortcomings and keep it moving. But essentially (again, this is just with a 14-game sample size) Perk's absence doesn't really seem relevant to how our team defense does. On the other hand, Shaq seems to be hugely relevant to how our team offense does. When I put those two things side by side, I don't really see how this is much of a competition.