junction == HUGE difference. Yes i was running separate copies of wow on 2 different hard drives. I actually have a dual raptor configured in raid 1 as one of them and was only using it for a couple of the sessions, now they're all mapped to one copy on that array. Swapping out the different sized windows is now under 1 sec latency. Woot!

I'll try adjusting my regions to equal each other and see how that improves things.