Originally Posted by Zero82z
Not only does the game require you to be online, but all events are actually handled server-side (movement, attacks, enemy placement and actions, etc.). This means that if your internet connection has high latency or doesn't have a lot of bandwidth and gets bogged down easily by data transfer, you'll experience lag in the single-player mode of Diablo 3.
Wow... if that's true, then I won't even try out this game. It's not like I was going to anyway, since I played Torchlight II beta and it was pretty decent