from what I remember, the American and European numbers come in at the same time, and ioi just decided to calculate the European numbers first.
All the Japanese numbers don't come in till later so he does them last. The Japanese preview is based off one of the retailers who submit the numbers earlier in the week.
EDIT: also, ioi lives in the UK, and famitsu was just released today. if ioi releases the numbers today, then they came on the same day, and famitsu just had the benefit of time zone differences.








