A friend of mine was at Avenue A/Razorfish when the Pepsi logo came through. She couldn't vouch for the authenticity of the document, but she said that she'd seen some of the images before in internal discussions. It surprised none of my design friends. Work with architects or designers long enough and you will start seeing everything in terms of golden means.
I'm having a hard time with it too. I totally get reverence for the golden ratio (an idea who's virtues I was skeptical about when I first learned about it in art class...at least to the degree with which it was praised) coming from the design crowd. That document just went so far beyond. If I had to put drinking money on it I'd say it wasn't real but hope my friends weren't thirsty.She couldn't vouch for the authenticity of the document,