Well, we know that ioi takes the data he has, and uses a formula (or a group of formula updated to reflect trends) to extrapolate worldwide sales. From this, he produces estimations that appear on the front page. Without a doubt, Black Friday and the week before Christmas are the most difficult to extrapolate, and the fact that there are so many different bundles makes it just that much more difficult. Worldwide right now, there are something like 20 different bundles I can name off the top of my head. The only remedy to this chaos is the fact that Japan is kind enough to provide 3 different market samples.