Speed is awesome!
Speed is so superior to other super-powers that either of these things could have happened during the final battle at the prom, if the character, Speed had been smart.
1. Speed could have swooped up his Ally, Penny ,and Layla and shave scooted them to an interior room of the school, far away from plant life, and dropped them off there. Penny could have then duplicated and whooped Layla's butt, easy. Then Speed could have returned to knock the flame boy out before Warren could flick a small flame.
2. Speed could have swooped up Warren, Will, Layla, and the other good guys and hung them on the flag pole like fish on a stringer. Then he could have helped Royal Pain defeat the adults. He could have strung up The Commander, Jetstream and Principal Powers before they could blink. They were so slow, they were turned into babies before they could react to Royal Pain's baby-ray.