in a perfect world having lots of traction would mean lower times in the 0-50m range BUT concrete has a rough (high friction) surface which means if we use slicks we'll have TOO MUCH traction & the front end would almost be certain to reach for the sky the moment you launch the scooter & that is bad, VERY BAD.
we would lose more time recovering from a monster wheelie which the 2Fast engine is capable of that's why we use Dunlop TT91GP, it just has the right amount of grip for most of the roads here, we'd rather have the rear tire break traction & spin than get full grip & do a monster wheelie, tire spin can be controlled by modulating the throttle something which my rider has gotten very good at.
for smoother roads like asphalt where it has lower friction a slick would be perfect b'coz with the Dunlop TT91GP we have to do a burnout to heat up the tires for more grip, it is so much easier to race on the asphalt than it is with concrete.