It was not designed to be a odd way to quickly scoot across the mat during Brazilian Jiu-Jitsu class. It was designed to help you move your hips. Keep shrimping my friends, it is not a race.
Many BJJ students race across the mat at full speed. Focus on curling your body and getting a lot of hip movement. “There are many different kinds of shrimp” Bubba from Forrest Gump once said. Try these different shrimps: using one leg, both legs and shrimping with the opposite leg. Feel the difference from shrimping with a flat foot and shrimping with your toes. Try moving your feet close to your butt and then try shrimping with your feet at a distance. All of these shrimps will produce a different result. From white belt to black belt, everyone uses the shrimp to escape side control and mount.