The -trend- is that Nintendo have moved to push hardware at a profit, with tech prices generally going up Nintendo have (justifiedly so) chosen not to fight to get to a certain tech level and avoid the usual razor/blade model that Sony/MS go for (though force into a period of it with 3DS).
Iwata's Pre-Wii TGS keynote DOCUMENTS that Nintendo believed that the industry could not persist with a spec war. If it's not a trend, it's certainly the companies strategy and the DS, 3DS, Wii, and Wii U will be testiment to this.
I don't see what the problem is - Wii U will have the biggest delta between the current platform performance and the next gen platforms performance. Whilst that is going to <mystery random % or X factor here> better than X360/PS3 it will inevitably end up being weaker than X720/PS4 - but the perceived improvement, platform to platform, is going to be astonishingly large for Nintendo fans.
Again - i think when Nintendo fans get on the #rolleyeweakesthardware horse, they're missing the point.