"Drop hacks" / Lag
Since other players also connect to Blizzard's server, not you, there is no way to be "drop hacked" in SC2. Drop hacking involves terminating the connection to the other player via some means - trivial in BW since both players are connected to each other - desynchronize the connection and you get a drop. However in SC2, since you are only connected to Blizzard's server, not the other player, the most you can do is disconnect yourself from the server, causing you to drop. Since the server knows who disconnected, it can award the win to the remaining player.
Note that this does not preclude any bugs in SC2 that might allow someone to purposefully cause a drop condition by sending malformed packets that crash the server (thus dropping everyone), but given the server architecture, drop hacking should not be an issue in SC2 provided the servers are reliable and well-coded.
http://www.teamliquid.net/forum/viewmessage.php?topic_id=117158
dont think it was a drophack..