I love it. All I say is "Really?", and the trolls totter out from under the bridge.
First off, I haven't played the game (single-player), and that was more of a response hoping he would elaborate on what made it so "extraordinary", as I've only heard luke-warm things. And if it's as good as all that, I might have to give it a go.
Deal with it. Stop defending these games like they're your own stunted offspring being picked on after school. Some of us aren't interested in the "BF3 vs. MW4 War for All Nerd Souls", and just want to discuss the merits of a good game.
It's short and sweet. You should play it. Don't worry if you don't understand the story, hardly anyone does. It's not trying to be Shakespeare. It's over the top, constantly changing and rarely lets up.
I think most of the discontent comes from how it's relatively simple - your job is to just follow the leader, ride the ride and shoot things along the way. There's no RPG elements or really any choice about what to do next. Plenty of games are good at that stuff and I'm glad for it, but that's never what any CoD has been about. Even though it's really good at what it's trying for, it's an easy target to be snooty about.