I don't recall not being able to play for a month either but WoW had a good bit of issues. Crashes, nasty lag, etc for more then just a few days. The loot bug to where you'd go to loot certain things and you'd get stuck in the looting position, the only way out of it was to re-log.
So WoW had it's fair share of problems, funny how it had some nasty problems and people seemed over-all ok with it. Other games could have less issues and people go off the deep end over it. I recall telling friends and family that was playing WoW "If this was any other mmo having these type of problems, people would be leaving it left and right!"