I rechecked Art De Vany's website and noticed that his perscribed workout only is only done about 2x's a week with 3 days between. Might this have anything to do with anything?
Also, I thought about it a little bit more and he notes that fasting post workout will inhibit other anabolic hormones such as IGF1. Maybe the article Larry referred to was incorrect mentioning GH, but not with regard to IGF, DHEA, insulin etc. De Vany's idea seems to revolve much more around GH and testosterone and minimizing the other because while they may promote some increases in performance they are detrimental to longevity and good health (eg bodybuilders). Still someone's wrong about insulin being necessary/bad for the GH release.