LOL.. I consider myself a gamer but unfortunately I have no interest in Diablo because I don't like strategy games or whatever they are called. A good friend of mine is dying for it, though, so I guess I'll be trying it at his place when he gets it. The last strategy game I played was probably Red Alert 2, and I hated it. I'm more of a FPS or MMORPG guy.
I was able to play for an hour last night, without any issues. Since I can only dedicate a limited amount of time to playing the game, that link might help in seeing if they are having issues prior to planning to play the game.