IMO, that is a silly statement. It's you not the rifle that is pulling the trigger faster. You are basically stating that because the AR15 is semi that you feel the need to pull the trigger faster than if you were shooting a bolt action. If you are not disciplined to control your trigger pulls, than bolt action would be for people like yourself.My AR sits in my safe while the CZ 5.56 bolt gets a trip to the range every time. I got tired of pulling the trigger repeatedly and watching my ammo supply dwindle faster than I liked. This one makes me slow down and think about my shots.
I've never had an issue with shooting my AR15s the same way I shoot my bolt action rifles...which is one controlled shot at a time. I like to have he option to shoot faster if I need/want to, but I don't shoot the AR15s any faster due it them being semi auto.