It's back again tonight... every night for about a month. And still no word from blizz why it's happening or any clue when it will be fixed. This is absolutely horrible and it's getting worse.
Sorry to add yet another post about our battlegroup, just hoping that one of em might get an answer some time.
Please help me gather the information related to this issue and post in the following thread: (http://forums.worldofwarcraft.com/thread.html?topicId=23141114035&sid=1). I will be locking any additional threads discussing the Latency, in an effort to help with the consolidation of this issue. This will help me track the issue better and ensure that everyone is aware of updates when they are made available to me.
Thank you for your help, and please feel free to join us in the aforementioned thread.