Originally Posted by Kolya
Federer uses it a lot.
Kohlschreiber and Davydenko used it well against Roddick.
Yeah, this is what baffles me even more. It obviously works for Federer against big servers, he blocks the return back and practically toys with them during the rally.
I just don't see many amateurs using it. It doesn't seem to me to be a difficult technique to learn.