I can shave my face with an electric razor more quickly than I can with a wet shave, but I can't shave my neckline with an electric razor without turning it into a rashy mess. So I don't really have a choice of electric vs. wet shave, but electric plus wet shave vs. wet shave. It takes me the same amount of time to wash and soak my face and neck to soften the hair as to do only the neck, and the actual shaving step takes less than two minutes, so I'm trading off an insignificant time gain against a less close shave, which is why I no longer bother with electric razors.

I think shaving processes are probably too idiosyncratic to generalize well.