nope i think if it was any more instant opening the keyboard it would have to be psychic and actually unlock slightly before! i have oc'd to 1ghz though and i avoid using desktop widgets etc that i feel slow it down. the only time i notice lag is during the auto update check (its really crippling, i can tell soon as it starts) or playing games when i recieve an email etc it will slow a little.
if you dont want to oc try swappolube or some of the other performance tweaks floating around here.