I always have sport on - wet or dry, traffic or track, cold or hot engine. Without it, the first centimetre of pedal travel does almost nothing making smooth application and modulation of the throttle harder at lower RPMs. Of course, if you just stamp on the throttle, it's unnecessary, but for heel and toe and smooth driving at low speeds it's essential. I don't see the point of the "soft-start" standard map and wish it would default to on - I think sport off contributes to the reputation for kangarooing with a cold engine. If it were possible, I'd rather have a throttle cable but as a second choice "On" is the only way. So there!