Archie and all, I'll weigh in. It sounds to me that the guys are wondering about roll rate.
True, for slow rolls, ie- 1 roll takes about 2 1/2-3 seconds, or longer if you extend it, rudder use is required. But for a single roll in Sportsman schedule, 1 roll consumes about 1 second give or take which is a medium-fast speed. What veterans call "normal" speed.
For this roll, rudder isn't really necessary and may actually drive you nuts trying to figure out where you are in the roll and what you're inputing on the tx. As Archie sez, if you find yourself in the latter situation, it will be counterproductive in the short term.
Agreed, way back in our old pattern guide a slow roll was supposed to take about five seconds and three rolls 5 seconds. If your schedule reckons you can do a single roll as quick as you want then using rudder in a quick roll will cause you more problems than it's worth. However I've seen guys rolling fast lose points because they have trouble finishing up wings level. A noticable "stab" of down elevator in the middle might cost you a point, but finishing up with the wings 30deg out of level (under 1 tenth of a second at 360deg/sec) will cost you more.