I think it is really dishonest saying the increase in ms sales was due the pricecut.
Actually in the past two weeks microsoft did everything in their power to surpass ps4:
-exclusive sunset overdrive + exlusive halo collection
-exclusive bundle and marketing on COD + exclusive bundle and marketing Assassin's Creed+ exclusive bundle on fifa still from october but the game is still selling well
So this november they really are going all in, and despite that their victory in NPD is not set in stone, cause a lot will be decided on black friday, and it's not like ps4 stopped selling.
Let's wait and see, this will be the most interesting NPD from a long time!