The times will be strongly influenced by ceiling height, so if reporting times report that as well.
Why would you consider touches as "cheating"? in a girdered facility, or with hanging lights, touches may result in a stuck plane. IN a smooth ceiling, if the room is large enough for potential redirection after a touch, why not touch? A no-touch is a thing of beauty, but in low ceiling (20') with smooth ceiling, it may be a necessity.
I agree about planes grazing on smooth ceiling with no redirection is definitely okay. But I've seen kids deliberately launching at high torque in ceilings with girders and other obstructions, hoping the plane would not get stuck and the'd get a better time. Many of them end up stuck.