Umm, that's cool, but I can assure you not that's clearly not he case on all units. I have pictures of the one I took to Atlanta using a Kill-A-Watt, and there were enough witnesses that were present, including members of this forum (Bargraphics, Phin Gage), and representatives from competing companies that saw this for their own eyes. Also there's plenty in this thread amongst the first recipients to verify otherwise.
And I'd be willing to bet a few satoshi's that the unit you took to Atlanta did not have the same firmware as those units that were subsequently shipped out to Day 1 customers onwards...and that the voltage was tweaked upwards in the interim thus increasing the power requirements (in the name of increasing performance/stability, I'm sure). Couple the fact that the actual physical design of the product was changed quite substantially (8 VRMs to 4 VRMs) and it's not exactly apples-to-apples
Even in the "launch video" you have footage of the kill-a-watt pulling ~850W at the wall at (I assume) 240V with (I assume) 8 VRMs per board.
Not insinuating anything malicious here..just saying that what was put out there ended up being inadequate given the issues that cropped up with some of the 850 PSU's (HX850 that you had so much fun with, for instance).