Ah, OK. I didn't realize you were wondering about improving fps in Dalaran.
I think it's just that Dalaran is horrible for lag and fps anyways. The only way you'd be likely to get better performance there is to be alone on the server, lol. Blizz really should have made Dala a larger area or something. I'm pretty sure what you see for fps there is average.
***EDIT***
Although I did read somewhere that WoW is more CPU intensive than GPU intensive, and there was something on another forum about selecting processor affinity for WoW on quad core's. I don't remember where I had seen that though
