I fully agree as each of us have our own specific genetics, but one also must remember that it's impossible to isolate any one bodypart over another and as such there is quite a bit of "spill over" from one bodypart to another.
Good point ps. I should have been more specific. The way I rotate my workouts leads to a certain workout being performed twice in a week every third week. That particular workout is also followed by two days off so I get some rest after it.
I'm glad you mentioned that!