Yes you definately have a valid point. 3dmark benchmarks the whole system with some preferences to the video card. The only time the cpu doesnt really matter in 3dmark is when the video card is maxed out and a faster cpu doesnt do any good. The latest video cards though are cpu limited. We already know that the athlon performs better with the higher fsb also.
Of course for DC projects sisofts drystones and whetstones would give a better indication of performance.
As always though... the best way to see if something does what you want is to try it yourself!
Is anyone going to buy one when its avaiable?