Yep, you guessed right, or wrong, doesn't really matter, what matters is, the X1 is dangerously close to the PS4 in US which is the major market both companies are targeting primarily.
In Jan, the PS4 almost doubled the X1 sales with almost 140k lead to the PS4. In Feb, that difference shrinked to 30k and the overall difference is 300k which isn't much.
TitanFall is the next big X1 release, while Infamous is the next big PS4 release. And let's not fool ourselves, Infamous looks much more fun and next gen than TF, but TF will sell much more and this is probably why the X1 pretty much closed the gap in Feb.
I am not alienating JPN and Europe, but if Sony was to choose between which market to dominate, it would have chosen NA, So it really needs to hit harder than that, because if can't live on an initial lead that's fading away.