Well at least they are someone who actually has the balls to stand forward. In that department they deserve a kudos. Not only that, but they have actually developed for the system as well. Even so this doesn't match with what the majority of NAMED developers have said. I would love to hear why it is less powerful, other than "nintendo has a different focus." I won't write off what he said, but I don't see why his words have any power against the words of Criterion or Shinen, developers that actually have tried to push the hardware.
Also, the PS3 are a much older system. This gices me two reasons to think that the wii u is more powerful. First, the launch games on the Wii U looked way better than the PS3's launch games. Secondly, the tech needed for PS3 power should be more than cheap enough for Nintendo. Remember that even the Wii was more powerful that all the consoles from the generation before it.