[quote name='MasterSprtn117']He does have a point there though. I wouldn't really want to play with randoms off of XBL. Just think of what could happen..you're about to finish the level, and then one guy kills everyone else with a rocket launcher, and then kills himself. Turns out he was host, and when everyone booted him, the game has to reconfigure and now everyone's stuck with lag from the new host.
Of course, that could happen with your friends, but then it's not as bad since you know them...usually.[/QUOTE]
As the commenter wrote in the Kotaku story wrote...even the original Nazi Zombies map in CoD: WaW had matchmaking, and that was a throwaway bonus game mode.
And even in Nazi Zombies, or even L4D, there were times when my friends and I could only get 3 or so people together, so jumping into matchmaking to find a 4th player really helped out.