1.6 Leaked Patch Notes

[MongoJerry]

Well, actually the remaining Auction Houses were also moved (Undercity and Stormwind were both most popular Auction Houses because of their locations) to the now known locations in Ironforge and Orgrimmar, in effort to reduce lag. Of course, since most of the lag actually came from tremendous amount of people and not location, the lag moved to new locations as well.

Well, it did reduce lag somewhat, because the locations of the Ironforge and Orgrimmar AH's are in areas that are more free of non-player objects than the AH locations in Stormwind and Undercity. But, of course, when you have that many players confined to such a small area, you're going to get lag anyway. Thank God, they disabled dueling in those areas, too. The real way to reduce the lag would be to have linked auction houses. I, for one, would definitely set Undercity as my home if that happened and leave Orgrimmar for good.