Just to give you the proof Edge is in fact 360 biased, here are the numbers :
Game / Edge rating / Meta (12/02/10) / Difference between Edge and Meta
Main 360 console exclusives :
Fable 2 / 90 / 89 / +1
Forza 2 / 90 / 90 / 0
Forza 3 / 90 / 92 / -2
Gears of War / 80 / 94 / -14
Gears of War 2 / 90 / 93 / -3
Halo 3 / 100 / 94 / +6
Halo 3 ODST / 90 / 83 / +7
Mass Effect / 70 / 91 / -21
Mass Effect 2 / 90 / 96 / -6
Left 4 Dead / 90 / 89 / +1
Left 4 Dead 2 / 90 / 89 / +1
Total (11 games) : -30 points
Average -2.73 / game
Main PS3 exclusives :
MGS4 / 80 / 94 / -14
Ratchet ToD / 80 / 89 / -9
Ratchet ACiT / 70 / 87 / -17
Resistance / 70 / 86 / -16
Resistance 2 / 60 / 87 / -27
Killzone 2 / 70 / 91 / -21
Valkyria Chr. / 70 / 86 / -16
Disgaea 3 / 80 / 78 / +2
Heavy Rain / 70 / 89 / -19
Uncharted / 80 / 88 / -8
Uncharted 2 / 90 / 96 / -6
Demon's Souls / 90 / 89 / +1
LittleBigPlanet / 100 / 95 / +5
Wipeout HD / 80 / 87 / -7
Flower / 70 / 87 / -17
Infamous / 70 / 85 / -15
Total (16 games) : -184 points !!!
Average -11.5 / game
So it's around 10 points difference in AVERAGE between a PS3 exclusive and a PC/360 console exclusive, which is huge and mathematically (statistically) impossible unless they're 360 biased or being 360 fanboys.
The other explanation would be they favor the shooter / FPS genre dominating on 360 (6 on 11 games reviewed), but then again, games like Resistance, Resistance 2, Killzone 2 wouldn't have been rated so much under their Meta then, so this explanation is wrong.
Conclusion : Edge is strongly 360 biased.
Essay Pro