I didnt say dont use a watch. On the contrary, do. You should.If the average hacker wasn't using a laser or watch, they'd be standing there looking at the 100 yd marker.....then the 150 marker.....then frying their brain trying to decide where in-between the two markers they actually are. You don't have to guess with a laser/watch, if you are half way decent using one it's faster..... and the result is more accurate.
I was only acknowleding the time wasted by lasers.