I have been running Tempest Keep the last few months with 4 friends. Yesterday the mount finally dropped after only 12 runs. We had already made a deal about Ashes of Al'ar would be mine if it dropped etc etc.
But then today, another guildie wanted to go in there and try it out. I came and helped them on my mage alt and guess what, the mount dropped again!
Armory links:
http://eu.battle.net/wow/en/characte...achievement#81
http://eu.battle.net/wow/en/characte...achievement#81
Have anyone else experienced something that should prove the drop rate has been increased? Or were we just extremly lucky?