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Khuutra said:
Weisheit said:

Vgchartz=guessing

Nintendo=estimates backed by the resources of a billion dollar company

 

See the difference?

Nintendo's primary advantage is in terms of size

Both sources are estimating

Actually, I'd take Nintendo's word as gospel.

http://ign64.ign.com/articles/073/073628p1.html

Nintendo today announced the opening of siras.com, a new company subsidiary dedicated to helping retailers and manufactures face common problems associated with fraudulent returns, product tracking and inventory management... Electronic registration tracks a product's serial number at the point of sale...

In other words, assuming they kept the system up, they should have real-time tracking of all their retail sales.