Actually, I'm surprised that the racers haven't snapped to this yet.
Golf ball manufacturers sure did a long time ago.

Don W. -- who is not a hydrodynamicist ;-)

Larry W4CSC wrote:
As to drag, a dimpled hull is FAR less drag than a smooth one that
creates no eddy currents. Watch the jetski racers draggin' their race
boats down the beach to roughen up the surface and break surface
tension because they know it will go faster.....and it does.