another tip, when in game, turn off fading of the menus or turn them off completely..
I don\'t know how much is correct I believe if you hold Ctrl+ right mouse click on any menu (such as menu with all buttons like greet, attack..) you will see enable fading check box, click that off.
Fading makes the menus fade in/out, causing more lag for weak graphic cards, I noticed if they are just solid, I am able to play faster.
Sound as well causes slow computers or computers with little ram to play slower.