Interesting. you have to assume a certain level of consistency in reviews, etc. but I guess that's fair enough.
It doesn't surprise me with the HD consoles - apart from a few wobbles on each (Haze, Too Human, etc) for the most part any big hyped title that is good will sell well. I guess some would argue that such titles tend to be overly praised by critics, but it would be impossible to try and weight the analysis to account for this. I guess it could be argued that the HD consoles would almost always skew towards well reviewing titles and that there is a case for seeing reviews, etc. skewed towards the HD console titles (more on that in a moment).
It's also possible that its better to have the Wii's position vs the HD twins - i.e. while high reviewing, big budget titles sell well lots of other stuff tanks on HD consoles while Wii sells lots of stuff well, quality or not, and tends to support better on-going sales vs a big spike for the next big thing.
It should also be noted that Wii titles may not be as consistently reviewed as HD titles - in particular many fun, well selling titles tend to get poor reviews that probably indicate a review system stance vs content mismatch. So I wouldn't see the Wii as necessarily trailing for quality as much as the analysis suggests.
Try to be reasonable... its easier than you think...
