@Bitmap Frogs: That's the view and somewhat the reality (except the numbers usually get corrected with shipment data). But, as long as the view isn't going to change, the transparency isn't going to help a shit.
The real problem isn't with VGC, it's the data it provides not pleasing people. When you look at peoples attitude in general, if VGC is showing that for example Wii sold 1M last month, 360 300k and PS3 250k in Americas and NPD is showing the same (of course, since NPD is for US only, VGC numbers are higher), people first look at the differences between the numbers, then the discussion goes to VGC credibility, claiming that VGC numbers are BS, which means that at the same time the same people claim NPD numbers being BS (if both show the same, they both need to be BS), which is nothing more than a way to try to deny the "wrong" numbers somehow and hope the reality goes away. Also, a thing that people should take into account when judging the numbers and authorities; Famitsu and Media Create both work with about the same sized market percentage that NPD does and they still manage to pull out about a 50% difference between their numbers from time to time.

Basically making an estimation of the market with 2-3% sample is easy and quite fast, but what's the hard part, is the data calibration, since different products sell in different way in different stores and we usually have new products on the market each week, which you need to calibrate with previous similar games sales.

You know what I find funny? Go Nintendo users rag on VGchartz because of the time they got some numbers wrong and decided to hate on the site. Yet, the ironic thing is that the users at Nintendo World Report can't stand Go Nintendo because of a dispute between Kevin Cassidy and a NWR staff member.

Its like the ones that like to fan the fires are the users.