Up close this is true, how about at a distance?
From my observations, it is true at a distance as well. The currents are stronger in the middle of the stream with the smaller orifice but off to the sides, the larger orifice has more flow. But I would expect this behavior since the more force you have in a particular direction, the further the flow should travel. You can actually prove this to yourself with a hose and an adjustable nozzle. The smaller the nozzle the further the water travels both above water level and below water level just to different extents due to the differences in density of air and water.