NPD is not accurate ( partly )

[Lafiel]

kirby007 said:

KingdomHeartsFan said:

Is there even that many people saying NDP is 100% accurate to justify this thread?  I haven't seen anyone saying its 100%, just that its the most accurate thing we have to work with. 

So explain to me why its being used as gospel?

with the incredibly large sample size they have their numbers should be very close to real numbers

they are close enough for MS to post them as their monthly consumer sales in US for years