I haven't seen a single drake on my server yet
The first time we killed Al'Akir, it dropped for us. :P Looks pretty sick.
My YouTube Channel.: http://www.youtube.com/user/Tharilyon
Like I said, I haven't done him on Heroic, but it was just soooo easy on normal. We spent more time and attempts progressing on Cho'Gall than we did Big Al, and we don't have Nef down so that's why I said Al is easier than Cho and Nef.
I played on Maelstrom in vanilla btw, Flavie of Korkron Warband, priest
Lained - 60 Shaman | Lainedtv - 60 Druid | Lainedz - 60 Paladin
Seen it drop once two month back, I'm sure there's been others, but the model is not unique enough to stand out in a crowded Org amongst all the other colors/variations.
As ugly as something like the Onyxian Drake is, at least it's unique.