Whilst the author has got a fair few things wrong he is right about brute force ports (ports that aren't optimised for the U hardware) running poorly. He's right about the CPU not being suited to floating point operations and, if it's anything like the Broadway, it will outperform the Xenon at general processing...Broadway does after all, believe it or not. And he's right about the GPU being ideal to take on the floating point work.
He has also forgotten to mention that the Xenon handles all sound, IO and OS processing and that the U has dedicated silicon for those tasks which (assuming a developer isn't trying a lazy, brute force port) will free up the CPU for other tasks. The DSP alone (Digital Sound Processor) alone will save a great deal of work that the Xenon does - developers are required to have 1 thread dedicated to sound alone, that's 1/6th or 16.6% of the total CPU power...and some titles dedicate twice that to handle audio.
And he's also right about all 3 next gen consoles having a similar architecture, having a CPU for general processing that's likely to be clocked lower than the Xenon and Cell that's unsuitable for floating point work and leaving the GPU to perform such tasks. It's going to be easier to port between the U, PS4 and 720 than it is to port between the U, PS3 and 360.
So he's got some parts right as I've explained above, and some things wrong which some of you have already pointed out. The 5670, for example (if I'm remembering correctly) isn't a PC component at all, it's used in casino video games...although I will stand to be corrected on that.
Just sounds like he's been reading the Gaf U Speculation Thread and hasn't understood everything.
Edit: And he is right about the GPGPUs too. Nintendo themselves have confirmed that the GPU is a GPGPU and leaks have suggested that the PS4 and 720 are following suit.
