Yup. They are biased. Nothing is going to change that. People will argue this to death, but the core demographic that the Review sites aim at are, in a majority, the so-called "hardcore gamer". I have seen only a few sites that give merit to fun, but they are few and far between.
The only exception with Gamespot, that I am aware of, is that they gave Wario Ware: Smooth Moves (Wii) a 9.1, mainly because it made great use of the Wiimote all-around.







