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!
Have anyone else experienced something that should prove the drop rate has been increased? Or were we just extremly lucky?