On the one hand, it's amazing. On the other hand, it's not all that surprising because it's Duncan. We've always known he was a smart guy so it's no shock that he has taken care of his body and adapted his game. In a way it's a shame. This is just another example of Timmy not getting the same love as some flashier players. In this case it's not just because he's a quiet guy in a small market. He has spoiled us. Because he's Tim Duncan we expect him to do the right things and just keep going out there and playing well.
The one downside I see is that he doesn't have much explosiveness around basket anymore. He's not completely used up like Patrick or Hakeem at the end of their careers but he can struggle to finish and defend against younger guys. Per my response to Randy, that will be a major liability against the Grizz, much as it was against the Thunder last year.