Some people see what they want to see, not whats actually there. Now, I don't know the exact level of passion Drew or anyone else has, but it is evident in his play that he hustles, plays hard, and IS emotional, and as far as I know he puts in the practice time to be good.
Anyways, you are right too, it is impossible to actually quantify, I was half-joking, I'm still pumped up from the Celtics lastnight. Rondo!