He is right to some extant. BTW a keen observer can feel it while in top gear coz in initial stage this issue apears in top gear or higher gears only.
@asjdsm
Adding extra clutch plate is Jugar to improve performance of worn clutch system that may include fualty clutch box hub, pressure plates, & clutch plate it self.
Adding high tension springs, reduces transition time while disengaging clucth & can serve good for racing etc purposes (as it will allow abrupt power delivery to wheel/final drive) but for normal riding clutch will not respond smoothly & will give jerks.