Considering how the PS3 version includes a copy of the PC version, and how Valve is against DRM (other than Steam, which most people don't seem to mind) it'd make a lot of sense that they'd release it early for the PC. If they have the same release date for PS3 and PC the PS3 version is a better deal since you can just play it on PC and sell the PS3 disc. If they release it a week(end) early for PC, the all those impatient PC gamers that planned to buy the PS3 version will have a choice to either save money or get it now.