They have three of the top 20 players in the conference and eight of the top 75. That stacks up favorably with everyone else, and they haven't had any injuries, and that's why they've won.
So sorry, San Antonio -- I'm not going to endorse Tony Parker just because his front office found Gary Neal and DeJuan Blair, or nominate Duncan because Richard Jefferson figured out how to play off the ball. Instead, I have to compare the individual output of Duncan and Parker to their peers, and when I do, they don't stand up.