I'd point out, also, that last time the NPD numbers came out, the VGChartz' PS3 numbers were noticeably too high and the Wii numbers were very significantly low. In other words, NPD thinks the Wii is doing even better than Ioi does, and that the PS3 is doing even worse.
If you think this site is bad for the PS3... don't check the professional ones!
Look here for proof: http://www.vgchartz.com/news/index.php?start=10
As I stated, Wii was listed at 402,000 by NPD, and 360,000 by VGChartz: PS3 was listed at 89,200 by NPD, and 106,559 by VGChartz. VGChartz overestimated the PS3 total by 17,000, and underestimated the Wii total by 42,000. Clearly, VGChartz is biased against the Wii!
....or how about we agree that small discrepencies are always going to occur, in both directions? Had you considered the possibility that the PS3 total wasn't added last week precisely because it was overestimated? His total was almost 20,000 above that of the NPD. So, by not adding 20,000 new sales, those numbers were brought into line.
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