It's impossible to say because he's not on any other team, and maybe on another team he's not the third best player (though maybe he is) but what exactly do you think doesn't translate? I'd expect him to basically be the best defensive player in the league no matter where he is. His efficiency numbers might drop a bit on a lesser team, but his counting stats would probably go up. I don't watch him and think he's being propped up, for lack of a better term, by the team he's on. He's the biggest reason they're as good as they are.
Of course, then I look at the Spurs splits when he sits vs. when he plays; they're 15.5 points better than the opposition per 100 possessions when he plays, and 13 per 100 better when he sits. So, who knows, maybe you're right.
