He finally clarified.
SW > XB1 > PS4
Was trying to just thank folks for supporting us and the incredible success following the launch of Xbox One X. But yes Xbox outsold PS4 in December for Gen 8 consoles according to NPD data, while Nintendo also had a great month as Switch had most overall units.
— Aaron Greenberg ??????????????????? (@aarongreenberg) January 12, 2018
SW > XB1 > PS4