wow was designed to run on Tandy 1000's, they specificly wanted to make every computer run wow. wow's graphics were terrible, it is no game to state a cards abilities by... now battlefield 2 when it came out at full gpu power, that was a feat to take on!
Totally agree, I had to upgrade everything for that launch, hell, I even got a new keyboard....
I seem to have the same problem as the op but I'm using the following:
Processor: Intel Core 2 Quad Q6600 2.40 Ghz
Ram: 3 Gb
Video Card: Geforce 8500 GT
If you can suggest something I would welcome any information on why this game is still so jumpy.