>>4 Some games are wacked on a 64-bit system vs. 32-bit (I had major issues with Crysis 1, for example). I didn't think they should be theoretically, but that's my anecdote.
As for the OP, it is more than likely the software that came preloaded, or the configuration, and not the hardwrae specs being faked. When you say the laptop had a specification, what do you mean? If it was just what the person told you, it could be faked. If it was just the stickers on the laptop, they could have taken them from somewhere else. If it was on the actual machine, I don't know of a way to fake that.