http://bugs.winehq.org/show_bug.cgi?id=33397
--- Comment #2 from Horia fakemoth@gmail.com --- It is really odd, maybe people think that this is how WoW should look like (not). It is confirmed on 3 different installs for openSUSE 13.1 (mine and someone alses, with different hardware, and also my Ubuntu 13.something friends complain about this. Everyone using AMDs proprietary driver.
Sure, now I am on wine-1.7.2-2.1.x86_64 and openSUSE 13.1. Also I have a monster R9 290 Sapphire GC; the fps is slightly higher but not to point to call it "playable". I should mention I play at high res. 1920x1080. It really has no sense to buy high end GC if you play on Wine, the problem is somewhere else, ma' 2 cents.