Have to agree; while I think the E3 Sony reaction was a bit over the top, it at least showed excitement for things I also felt excitement for.
The GB crew looked like a MS rep was on the other side of the camera reminding them to not show any enthusiasm for the Sony presser (not literally). I have only looked at recent GB stuff related to games I am interested in, so I am not sure if they are normally negative and/or reserved towards many games, simply don't like games like UC4, FF7_r, SM3, or TLG, or something else.
In the end I prefer media that meshes well with my interests. It helps me feel like I can trust their thoughts on games a bit more seeing they share my reactions to things.