Patch 5.1 Release Date Hint
Last Tuesday someone asked Dave Kosak if the patch would be arriving two months after Mists of Pandaria was released, as is indicated by several quests. Keep in mind Mists of Pandaria was launched on September 25th, so the closest date is this week! There is also a blue post about it being very, very soon on the forums.
http://wow.gameguyz.com/sites/defaul...-26_114643.jpg
