Interesting. Don't take this as a smart-ass reply (because it isn't, i'm rather intrigued), but how did you come to these figures as being legit?
I've researched and researched, but I can't seem to find any solid evidence that a relatively high protein intake as you mention is beneficial.
All the research I've found simply states that too much at any one time is excreted, but they don't tell you about a high intake over the period of a whole day.
At the same time though, I should note that no one is yet to prove a high intake is of any harm on a healthy individual.
Do you have any articles backed by proper research I could have a read through?
Again, not challenging you, rather trying to gain some insight.