The OFFICIAL March 2007 NPD thread

[Lingyis]

Erik Aston said:
The data is actually pretty bad. It'd be one thing, for example, if they overestimated everything... Or were just generally in proportion to NPD numbers... Then they'd know how to correct. It seems they are off in both directions, though. More often than not, they overestimated... But when you've got the odd game in there that's waaay underestimated (GH2... 97K vs 291K), it makes it difficult to know how to correct their calculations... I mean, Lingyis just mentioned the physical size of the game with GHII... That's something there is no way they can try to take into account... It amounts to total guesswork, though it looks like that is what they are doing now anyways.

thankfully, there aren't many games in the genre of guitar hero. Guitar Hero and DDR are the only 2 that takes up space right?

i bought my DDR game on ebay because i couldn't find the pads in store.  for online retailers inventory is probably more easily managed than store retailers...  

perhaps it's a sign that the retailers that are chosen aren't representative enough. 

in any case, there's only one data point so far, there'll be more data to work with.