Well I have wondered that myself, but what I think people seemed to forget about is natural test levels, now these can vary between people, so wouldnt this effect the amount of protein used by the body?
Surely it will and therefore there is no way to put a generic figure on how much a persons body would use
Its all down to the individual
I am not going to lower mine, Ive had great progress on it so far, I dont care how big the person is telling me to use 1g per 1lb, unless its a health risk, I know what works for me.