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.
That is exactly WRONG! Speed is indeed a judging criteria. If the speed is to slow you wont make the time limit, if the speed is too high it all looks rushed and can make the maneuvers not so well defined, and if the speed varies the flight will loose its even flow.
And yes the second paragraph in the judging criteria ( smoothness and gracefulness) is indeed a subjective paragraph are made with that intention.