I'm guessing that the majority of the Xbone sales came from the FIFA amazon bundle thing (even though I can't find it on the best sellers list) and we now know that the Xbone outsold the PS4 in the UK this week so....maybe the digital FIFA copies that were sold with the bundles weren't counted..?
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right