No because keystrokes happen at the same time. They are cords. Is typing 'A' 2x the keystrokes that typing 'a'. Sure but it doesn't matter, it happens at the same time -- 'Shift+a'.

So it is actaully Vim that takes 2x the time to do anything because you have multiple modes to track and switch from.

If you look at how stenographers type, they don't use modes, they use cords. They also minimize moving the hands away from the homerow (or equivalent of), and by "minimize" I think that movement might be 0 actually.