I have always done this when shifting up while accelerating and at least mid way in the rpms if I don't have a quickshifter. Have never experienced any clutch related failures due to this, but I could see someone just learning, doing this "improperly", maybe causing some premature wear on clutch related parts.
If you take load off (throttle), it will allow you to shift up on any motorcycle.
If you take load off (throttle), it will allow you to shift up on any motorcycle.