I think it's the praise of Ghosts for the same reasons Killzone's getting shot down that seems to be annoying a lot of people.
They have literally the same metacritic. So both have them have been slagged off for being boring slog fests of FPS'. Bring back fucking timesplitters man. Or even Bulletstorm 2, that shit was better than most the FPS wank which gets shoved out.
People just like to focus on one site (polygon in this case) and forget that perhaps some negative aspects of the both games have been mentioned across MOST reviews. It's not like Gies is a lone voice in saying KZ is tired and dull.
He is just the talksport of reviewers. And guess what, gaming side are doing exactly what he wants.