Pick up my pre-order Tuesday. Most hardcore Call of Duty fans hate this game. It relies heavily on tactical understanding and teamwork where as CoD is about "pad skills".
The amount of people that want to be snipers can be extremely annoying but a coordinated team effort neutralizes that. It's satisfying experience too. Using smoke grenades and gunfire to suppress a sniper so that you or a teammate can flank and shoot them in their damn face.