Hmmmm....

According to Webster's dictionary the definition of:

Smoothness
1 : having a continuous even surface (2) of a curve : being the representation of a function with a continuous first derivative (3) : having or being a short even coat of hair <a smooth collie> -- compare ROUGH, WIREHAIRED b : being without hair c : GLABROUS <a smooth leaf> d : causing no resistance to sliding
2 : free from difficulties or impediments <the smooth course of his life>
3 : even and uninterrupted in flow or flight
4 : excessively and often artfully suave : INGRATIATING <a smooth operator>
5 a : SERENE, EQUABLE <a smooth disposition> b : AMIABLE, COURTEOUS
6 a : not sharp or harsh <a smooth sherry> b : free from lumps

Gracefulness
: displaying grace in form or action : pleasing or attractive in line, proportion, or movement

If a Judge interprets speed from these definitions as a judging criteria then they are adding their own subjective criteria which would be unfair to a competitor who executes maneuvers flawlessly by the above listed definitions although does it at a pace faster/quicker than others.