Spent some time on the AV-8B Mission Computer software team (as far as I know, a lot of my code is still running on the remaining USMC AV-8Bs). One of the functions in the MC allows the pilot to compute the shortest rolling takeoff distance for gross weight and conditions. The nozzle stop is set to the computed value and takeoff roll started with the nozzles full aft, then at the computed airspeed the nozzles are rotated to the stop and the aircraft lifts off.