Currently Online 
2M vs 1.6M this early on is exceptionally well considering this is primarily a game that sides with Xbox. Past iterations usually had a 2 million player base lead (Besides Ghosts due to Next gen just launching and the game being lackluster)
With exclusive marketing, MLG CoD tournaments and a loyal fanbase to the Xbox community, I think this is a major plus for Sony. That's like a Final Fantasy Xbox sku outselling the Playstation sku. It really speaks volumes on how gamers are embracing the PS4.
Of course you'll get your "what's the big deal" posts and downplays along with attach rate excuses but at the end of the day it's looking like Call of Duty is being played by more Playstation gamers then any other home console. A big turn around from last gen and a big Kudos to Sony and the PS4. Really goes to show you that Amazon US best sellers lists is just a small piece of a very large pie.
