I have found the "clean off the blade frequency" to be a red herring argument. I can get 1/4 of my face with a 5/8 so its 4 wipes instead of 2. Not a big advantage from my point of view.
Yeah, you're probably right that the time saved is not significant between 2 wipes and 4 wipes.
One could say, though, that there is a certain coolness factor in a large blade holding such a large amount of lather.