I have had the same COD friends since WaW. They have all bought the new CODs and almost always played them until the new one came out. With MW3 there is only 1 or 2 people who still play it out of 20+ people and even they say that it is the worst COD yet. A lot of those friends played COD more than most people work at a full time job yet they dropped this one after only a few weeks.
I will be shocked if DLC is anywhere near previous years sales this time around.