Well I think the real question that Outcast was trying to ask is why there's only a large differential in the 360 numbers. Rentals and used game shoppers are nice explanations but don't work in the case where it's seemingly only one of the platforms with a large discrepency. What we should be wondering is one of two things:
1. What about the online setup of the 360 makes it different from the PS3 to cause such a huge discrepency in retail sales?
2. Are our numbers actually wrong in this case?