GTAV has sold abou 3 times more on PS4 than on X1.
And to the guy that said X1 will be US market leader... I'm not so sure about that. It could happen, it could not. We might even have PS4 and X1 neck and neck in the US. Just because X1 outsold the PS4 for 2 months out of 12 does not mean it has won the US lol.