That fix for the slower stuttering actually made it worse and turned me into a boat haha.
I've noticed however with Pre 9 since Pre 8 that it runs faster which I think I read in one of the patch notes is due to less lords. I'm thinking the main problem is just the amount of bodies running around the map at once. Lowering my graphics to none does not do much at all, I think it's all the problem of CPU's being unable to keep track of all the lords, peasants, farmers and whatnot on the map :/
So if there's anyway of bringing about less moving bodies on the map at once, then that is what must be done unless TW makes an uber patch of awesome to fix this issue.