Twintania and strange aggro behavior

[Sigred]

Pulling/Tanking Twintania before and after 2.1

We've been doing this since before 2.1, and saw the exact same thing as we see now. The behavior of the mobs is the same as pre-2.1. The behavior of players, however, tends to change as time goes on. The less time put into a fight, the less likely non-tanks are to jump the gun. You're probably only seeing it now because the rest of your group is more likely to start hitting abilities in that first 1-3GCDs.

[edit]

The only thing that may be a bug is if an add does literally go directly to a player that has done absolutely nothing at max range. I say may because it would be more likely to simply be an algorithm determining priority of targets when the aggro table is active, but no player is actually on it.