The PC gaming standard is relatively higher than console. Reviews are given based on the platform. Hence, a game that pushes a weak platform might score higher than the same game if it was released with the same features on a significantly more powerful platform.
For example, I have no doubt that super mario galaxy would have scored a lower score had it been released(in its current state) on an X360/PS3 due to the graphics and sound.
I am a Gamer... I play games and not consoles. I have a PC and Console on which I game... I like games. End of Story!