I appreciate that the Wii does't have nearly the processing power of the Xbox 360 or PS3, and the report also seems to respect their differences by comparing the Xbox 360 and PS3 extensively without including the Wii.
Now back to the business: Here we have an lower spec machine that competes and wins over the other two machines in terms of total sales. That's impressive. What's really amazing is while the competitors have increased Power Consumption in tandem with Processor Specs, Nintendo has managed to remain relatively flat on Power Consumption while still increasing Processor Specs (not as much granted) and remaining competitive. Nintendo pretty conclusively earned the power friendly bragging rights this report implies. This large a difference, to me, appears to be by design and I don't mean hardware.
The simpleness of the Wii itself should not be confused with Nintendo's business. Nintendo has demonstrated an understanding of the gaming industry and gamers themselves that far surpasses it's rivals. The Wii is just an expression of that.
That's what happens when you have a low UID, after a couple of bubble bursts you look past the shiny lights and fancy hardware.