We don't know the Wii U's full potential, even the hacker himself said so. You're basing the power of the Wii U off of a couple bad ports. You do realize that developers do not use the full potential of a console at launch, right?
Right that's why the competitors launch exclusives will look better then the Wii U's.
How do you know they lied...? Because the ports of the games from other consoles aren't 3X better? If Nintendo would have said "the clock frequencies of the CPU and GPU will be 3X as high as current consoles", that might have been a lie, judging from this. But they didn't. And come on, of course it will compete with Sony's and Microsoft's next consoles, even the Wii managed to compete with the 360 and the PS3, even though the difference in specs were probably much bigger than what will be the case between WiiU and the next Microsoft & Sony consoles.
That's why their 3rd party support sucked. It's funny how history repeats itself. The Wii's dead now and Sony and Microsofts consoles still thrive.