I didn't use a stop watch to time it. But the whole thing is close to 1 hour for me. Please understand that I don't use my PC as often as you guys. Mr. Stoop you are right that it does seem to be about same time doing it by hand. So using DA won't make it faster for me but more for even, thin application. Maybe using DA is slower than by hand for me consider that I have to switch back plate for small area.
I don't think I am using the DA wrongly. Maybe more about inexperience. For example, I could wax small area last, then I only need to switch back plate once. Maybe too meticulous.