We've also learned, unfortunately, that this latest Call of Duty still won't support dedicated servers, instead relying on the hosted servers found in previous iterations of the game. Dedicated servers were removed from the Modern Warfare games starting with Modern Warfare 2. (Modern Warfare 3 appears to be using DemonWare for player authentication, just like with Call of Duty: Black Ops.)
http://kotaku.com/5805959/the-modern-warfare-3-files-team-perks-no-nukes-new-killstreaks

Well then.. I guess that seals the deal for everyone. We will be playing Black Ops and Battlefield 3 for the rest of the year (BF3 starting late Fall).
No dedicated servers no deal. I boycotted MW2 for the same reason.