Realms are down for maintenance weekly--usually for a few hourson Tuesday AM.There are a handful of realms that have had problems and been down more often.
Lag has only really been a problem under 2 circumstances: 1. On a high population server in the big cities--notably Ironforge AKA Ironlag. 2. When an opposing faction of players organize a raid into enemy territory, anybody in the vicinity will get lag. This needs to be fixed, and since Blizzard is hyping the upcoming Battleground (massive PVP battles) hopefully it will be.
The question is not, Can they reason? nor, Can they talk? but, Can they suffer? ~Jeremy Bentham
