I don't jam the throttle. Part of the reason is that I fly pattern, and you'll get downgraded. Moving the throttle extremely slowly, however, doesn't work well either since you need speed to gain control authority (especially with conventional gear). The key is to move the throttle forward decisively, but don't jam. While you may get away with jamming the throttle on your first few models, more advanced aircraft (and larger aircraft) will not tolerate this practice.