Eh, i used 56k modem when i just bought the game.
Managed to lvled my shammy till mid40s with it.
Ping wasn't too bad, 1.2k-3k max. Decent enough for normal instances.
But definitely lag when i go to crowded places like AH.
After that, my application for streamyx finally got through.

BTW, im playing WoW through my new laptop recently when im staying in IMU. 512ram is decent enough to play the game at low-medium graphic settings.
Jaring wireless there suk big time.