Yeah, plus note these:
DIRECT X 10:
Theres the fact that those cards don't support Direct X 10 (I don't think), so when that arrives, which won't be too long now (When Viesta arrives), you wouldn't have used the power of them cards in your PC,
CPU BOTTLE NECKING:
Plus theres the fact that on a CPU like that, your going to get bottle necking whatever you do, so you'd get to a certain point where however much you add, your not going to increase FPS, simply because CPU's with that many video cards wouldn't cope that well.
I'm not too impressed by the FPS's though either on the quads for this reason.
I know its running higher than the highest HD res though, so I'll let them off, and those soft shadows do take up alot of power, but I do think the above makes the cards pointless right now.
You just wouldn't use all the resources, before games used a technology not possible on them cards.