More than likely. When i read all the stories about the memory/cpu issues, i instantly thought it was gonna be like my MW2 experience with stuttering and freezes. However, to my surprise the game has played perfectly on max settings without any slowdown or crashing from start to finish. For a game thats only just been released to not crash or have weird errors that some people are reporting is rather unusual.
I can't comment on MP since i dislike COD mp thus haven't tried it.
Some of the things being said however do sound like a mixture of gfx driver issues and poor optimisations for certain pc configurations. Just have to wait for a patch, like most games seem to need these days.