Also apparently D3 is the fastest-selling game for the PC. I guess this always-online DRM is going to get more popular.
I can't see the DRM influenced it one way or the other. Blizzard have a good history of quality products. Diablo has always been popular, and most of the players who enjoyed both no doubt bought the third - probably a big chunk of those sales at least.
Activision doesn't care about the Blizzard or Diablo brands in this case, a game with their dumb DRM scheme sold like a motherfucker and as far as they're concerned that's proof that the system works or at least isn't a deterrent.