I am honestly very curious to see what the team looks like during this time when Perkins is out. I have always believed that KG was the defense, and that Perk was more of a defensive role player who happened to have the required size and attitude to play his role. But, Perk was still, IMO, the either the 2nd or 3rd most important person for the defense (interchanged with Thibs, just ahead of Rondo).
From this quote, it sounds as though Perk sees himself as even more of a key to the defense, and confidence is good. But if Perk is right, then essentially he is one of the best defensive players in the NBA and the defense shouldn't be able to function without him. I don't believe that to be true, but we'll soon see. Perhaps Perk is being so aggressive in his comments now (between this one and the one stating emphatically that he'll start when he gets back) because he knows that if the team comes out and has a top defense this year even while he's out, he loses a lot of leverage to maintain his argument.