I am slamming more time into AoC thanks to my 3 character roster, so I do not have too much to add..
But, I do have this little screenie which shows what advancements they have made on the game engine optimization. I was flabbergasted over this..
(EDIT: Picture link fixed)
Zoom in to the upper left of that pic. Yes...that does say 142FPS...oh yes indeed...!!