There must be something wrong...

Hey guys, my computer is....
12gigs memory
gtx 285
i7 920
ext... all the top of the line stuff.

When running around i get like 20 FPS on all my guys, and the loading screens are veeeerrry slow.. Also, I have some problems with just annoying little bugs that arnt working right, aka macros that only sometimes work, or keyclone override button only works half the time, and my computer thinks im holding down the Tab button.. My main problem is performance though... usually this thing cooks.. 4 wows, anything I should install or w/e to help fix this?

o and every time i close wow, it freezes that window, so i have to right click, close, or cnrl alt delete it..

Have you setup your core affinities?

If you haven't, enable all 8 cores for each instance in Keyclone's command edtior.

Edit: Disable complex shadows if you have them on

1x AA is a good idea too.
And turn down shadows, they are hard on a system.

Outside of Dalaran, your system shouldn't have any issues, its a very nice system.
Within Dalaran, one thing you can try is to have your toons look down.
There's nothing lost looking at the ground, and it improves performance a ton.

I may be wrong but try capping max fps to 20 on your slaves /console maxfps 20. leave your main at 60. Id guess that system should be able to handle all toons on max settings really, but in any area like dalaran if all your toons are fighting to get to 60 fps you will experience massive lag and slow downs.