I've never seen people this butthurt about a review score before. Killzone has ALWAYS been average. Always. If you are a fan, go buy the game and enjoy it. Who gives a fuck about reviews.
GG is anything but average yo. Checkout their tech papers. They are top notch code slingers

edit- I should add I loved the multiplayer. was very unique in how the cutscenes would play at the beginning and end of multiplayer matches. Single player? I dont give a care (but I enjoyed that too). What makes KZ3 special was the MP. DISCLAIMER: I never played Kz2 though