I think Lee means he is undersized at PF, not SF. Interestingly, to add to this, according to NBA Stats and SportsVU, Kyle Singler has the tenth highest speed in the NBA. And even further to the point, off that top ten, he plays at least double of everyone elses minutes (except Patty Mills). So pretty much, TaS shows that he is a good defender, and this shows that he is the teams fastest moving player. Looks like I am proving myself wrong here - I thought he was going to be really middling. But no!