Teeqoz said:
Ka-pi96 said:
Dusk said:
Okay. So basically it all comes down to a load of BS than :) They just make up a bunch of garbage numbers that have no factual reference in the slightest. So all the systems could be over or under tracked. We all knew this, but to be off by just short of a million this quickly in the life span of the console is dumb. Might as well shut down the site :P
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VGChartz has 100% accurate information for a small number of stores and then extrapolates that to the whole population, make some adjusments based on sample bias. No it isn't 100% anymore, but it does have a solid start point and is an approximate estimation based on that. Other trackers such as NPD do the exact same thing, they are only more reliable because they start with a much larger sample.
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I think NPD gets data from like 48 % of all US retailers.
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From what I hear it's more like 90%.
