The guy taught me that you can fill the kiddy pool up faster if you put your finger over the end of the hose and make the water squirt out with more pressure - to this day I don't know if he really believed that or was just messing with me.
It's true, for the same reason a watched pot never boils. If you are doing something (even if just actively squirting it with your finger), it distracts you from the time it takes to fill it. The water flow will be sufficiently similar that the "difference" is the mind trick. Timed, they should be nearly equal. But in "feel" squirting should feel like less.