Not really, then again, this isn't really news at all. The Wii-U is obviously more powerful than then other 2 consoles, and it obviously uses much, much newer tech. Noone of any repute has claimed the system as a whole isn't more powerful than current gen, so there really isn't any controversy in that regard. The controversy comes from people not privy to any inside info claiming that the Wii-U isn't more powerful based on ports or games not meant to be graphical showcases from the launch window.
We know two things for certain.
The Wii-U is more powerful than current gen. The Wii-U is not as great of a leap in terms of raw power as the traditional generational gap over the previous generation.
Thus, as there isn't a great resolution bump, a new dimension, or massively superior capability it stands to reason that a port, or a game that doesn't push the system wouldn't look heads and shoulders superior to the 2 last gen HD consoles, especially since they've had years to mature. That does not mean, however, that software meant to push the hardware won't look noticeably superior to the offerings on the X-Box 360 and the Playstation 3. It isn't so much more powerful that a port is going to look way better at first glance just by virtue of being on the newer hardware, but I'm quite certain that once Nintendo's own flagship games, as well as 3rd party exclusives not rushed for launch or started on older hardware start to roll out, the Wii-U games will be on a whole, noticeably visually superior. What is weird, is that that is somehow a controversial belief, it should be obvious that more modern and capable hardware would outperform the older, less capable machines. Seems like commons sense.