"Both CoD 2 versions were in fact developed separately. "
Is that a joke? I've played both, the PC version is practically a direct port. And a slack one at that.
Let's say they were developed sperately, what in gods name would make a PC FPS developer put RECHARGEABLE health in their game?
Anyone should have known this is a console port the second they played the demo. IW had this exact same problem with CoD 1 when they neglected PB in a game with an engine that had been around for years. Back then, they had to support the PC gamers, their primary audience. Now, I'm not so confident we'll see the same reaction.