Wii U sales trend may be just as expected if we look at Nintendo's home console sales.

[UltimateUnknown]

Dr.Henry_Killinger said:

S.Peelman said:

Max King of the Wild said:

MohammadBadir said:
"Let's just ignore the Wii because it doesn't fit right with my theory".

outliers get thrown out ofstatistics all the time. thats normal and really people who want to point to wii you are grasping 

It's only an outlier if the data-points after the point deemed the outlier follow the same trend as the points before said outlier. While it's looking like the trend will at least level off, we don't know for sure yet. You can't definitively say, that the Wii is an outlier.

The GameCube was more or less 9.5 million at the same time in its life. That is trending below it and is strong evidence that the Wii U is in fact an outlier. At least until the Wii U makes up that gap and outsells the GameCube. Something that won't be possible if the market is shrinking.

This was pretty much what I was trying to say in the OP given the GC=9.55m and Wii U=6.25m sales figures for the same period of time both consoles have been out on the market. As someone earlier exactly calculated, the Wii U has dropped off to about 65% of GC with the above data. Incidentally, the GC had also dropped off to about 65% of N64. Even more ironnically, the N64 had also dropped to about 65% of SNES. NES to SNES was about 82%.

As the other poster pointed out, this 65% downward trend is quite interesting. That being said, the reason why I considered the Wii an anamaly (at least in terms of statistics) is because the Wii U numbers have fallen back (so far) into the EXACT same trend for the generations before the Wii. That was what was striking to me most and hence I wanted to see what others had to say about this. So far the discussion has been rather nice.