none of those are facts vgchartz has been so off with its numbers it laughable, last month they had wiiu at 87k, when it sold 51k in the npd and to say the wiiu is not struggling is delusional, it's traking a million behind gamecube, and tracking behind the dreamcast and thats with a 2d mario and 3d mario out.
It's funny how the console warmongers will use VGChartz numbers to support their argument (like "Wii U weekly global sales are on the decline"), but then say that VGChartz numbers are "so off... it (sic) laughable" when the numbers don't support their argument.
Newsflash: NPD uses exactly the same method as VGChartz to collect its numbers. They might (key word: might) collect more data, resulting in somewhat more accurate numbers, but they aren't reporting exact, real numbers, any more than VGChartz is. They are both estimates, and sometimes they'll disagree. There is no guarantee that NPD will be the "right" one. Indeed, even if NPD collected ten times as much raw data, they would still be less accurate than VGChartz every once in a while. That's elementary statistics.
Furthermore, the "51k" number is unconfirmed rumour - if I'm wrong, feel free to provide a solid source (someone on neogaf saying "50k < Wii U < 51k" in a prediction thread does not count as a 'solid source').
But all of that is irrelevant, since even if they're consistently overtracking, the key word is "consistently". What you've just said is that the numbers from october were even lower than VGChartz says... by that reasoning, either the increase is even bigger, or the increase is about the same and everything is just scaled a little bit wrong. Or are you suggesting that they're overtracking by even more in November than they did in October, with no evidence whatsoever to support the claim?