Well you do seem to be making some sense still thanks for all the clarification, I actually have a quad core Q9000 @ 2000Mhz combined with a pretty descent Nvidia 9800m GTX 18months ago which seems now (along with my cpu) to be severily outdated today... I still think that 35 to 40% CPU usage is still extremely low despite your information (which you noobified quite nicely to my understanding). Anyway only time will tell I think
What about other quad core users? Are your CPUs also being used so poorly? please post your data so I can have an idea
EDIT: Lol at your Raaaid comment