I would simply say there is deliberate disinformation going on from sources. Thats the simplest and most likely answer.
The information from all sides is just far too contrdictory and regardless of people trying to spin it as well this doesnt really disqualify that etc one side is spewing pure bullshit it really is that simple.
I am not going to say which side that is but its obvious one side is.
There is a conspiratorial voice speaking in the back of my mind:
Maybe some are downplaying the graphics capabilities intentionally, with the blessing of Nintendo, with the hopes that expectations are dampened a bit before E3?
Why would Mark Rein - of all people - come out with such praise, talking-up the system's capabilities? And the demos showing capabilities that are, we can conclude pretty easily, beyond this current generation's hardware? And Reggie and Iwata talking-up their pursuit of the core audience.. would they really be dense enough to launch another LastGen v2.1 console?
(maybe they would.. this is Nintendo we're talking about!)
The complete silence coming from Nintendo has my imagination running wild. I don't know what to believe, and something smells.
*adjusts tinfoil hat*