Actually, those theories are interesting. As an artist, I'm very familiar with those concepts. Fingertip to fingertip, outstretched, is exactly the same length as the hight of the individual. And dozens of other little things. Our bodies follow certian proportions... and proportion is just math, nothing more or less than. So, even biology obeys math in the end.
It does sound kinda neat when you put it that way. ^^