I already said I'm throwing out that EA number because of the fact that it is being rounded due to them rounding the 7th gen number. Take Two on the other hand specifically said "over" 60 million. That is specific, and not a "around" or "close to", but specifically "over".
The 360 was more around a 50/50 split actually, with a slight lead for the US.
The Xbox One had 60.6% of its sales in the US at the end of 2013, compared to the sales of 12 other countries. There is plenty of proof that didn't change in favor of the US by even a slim margin as the UK, Germany, and France all experienced similar performance post launch as the US did. Other launch countries like Brazil, Canada, Ireland, Mexico, and Australia should have performed similarly as well, with the only ones deviating from the pack being Spain and Italy, and those are tiny enough to where they wouldn't affect the ratio THAT much.
"Holiday sales" happen world wide and don't affect just the US, and again, the UK, Germany, and France have very similar post launch performance to the US, so even with the 2014 price drop, sales performance post launch was still similar for those 3 countries.
So a similar ratio of ~60-61% for those 13 countries post launch means that with an additional 29 countries, the ratio is dropping. It's simple math.
Those countries might sell like "shit", but they do sell consoles, and all those sales add up. All those sales not in the US. Suggesting >60% of the XB1's sales continue to happen in the US is actually preposterous.