He also said this, "“We keep track of the numbers on our interior defense, and we feel we have it covered with Shaq, Jermaine, Krstic and Big Baby (Glen Davis). We feel fantastic about our interior defense for a playoff run."
I believe our interior defense specifically and our overall defense in general always has had more to do with KG than Perk or anyone else.
There is no doubt that Perk is a good defender and without him, that is one less option to throw at the problem. It does not appear to me though that interior defense is what will be our playoff demise. Stagnent offense and missing shots seems to be more the problem, closely followed by rebounding.
Of the two (offense and rebounding) I seem to be more worried about offense. We have never been a good rebounding team but yet have been able to win in spite of that. I don't think we can overcome our recent offensive malaise, if it continues, and still win.