I remember reading that they're based off of surveys? I'm not sure where I got that from. If true, that does make question the validity of Famitsu's data. We know how accurate their Most Wanted poll is ...
The Famitsu digital sales are estimates based on surveys, and reseaches. The magazine says they use a website to do it, the poll is about 10.000 people for each system. They extrapolate and calculated the rest.
It's the sample big enough to be considered accurate?
Probably not, but it's the most official thing we have.
May add this info in the opening later.