First, just want to say thanks for all the help on this forum in regards to KT. I'm writing this a little late, but before Mists I was really wanting to start farming tempest keep for the mount. After reading all these forums I went in one weekend and for some reason it took me a really long time to get it. It was probably at least 15 attempts as Destruction, but I did finally get it. The next week went in there and my friend was visiting and bitching about having to watch me play wow. I had already started the encounter so I told him to just wait and if I wiped I would stop playing. While waiting on a phase I joked about the mount dropping while he was sitting there. A few minutes later, downed him, BAM A'lar. So two kills and got the mount. I've had exceptional luck with mount drops for some reason. Raven came on 4th attempt.