So, basically, I guess the answer is it doesn't matter?
Obviously Federer has the better forehand, but is Serena's easier to copy for mortals?
Not only Serena, and not only early takeback, I have posted many videos above which show the hands separating early in the turn. There is no distinct stalking phase and whatever is there does not need a new term to describe it. Regarding the early takeback, the deleted thread had so many examples from me that I don't know why this is still being discussed. It depends on the situation.