Well this is interesting. I don't agree with the authors summation, but its interesting. This also fits with the arguement that the PS3 is not more powerful than the 360 for games, which I do agree with.
@ http://www.theinquirer.net/default.aspx?article=39508
"The Geforce 7900 inside the PS3 is no match for Xenos in the Xbox. Even the Sony Cell would probably end beaten by 48 vec4+scalar units hidden inside Xbox's 360 graphics chip. Folding@Home is Stream Computing at its finest, and six/seven/eight SPE units can flourish in the CPU. But when compared to the GPU, the Xbox 360 GPU would probably run in circles around Cell CPU."