Assuming proper traction, the clutch's engagement rate is what determines how much peak impact energy your drivetrain parts will see. A clutch that takes 0.15 sec to pull the engine down after a WOT shift will impact the drivetrain roughly twice as hard as a clutch that pulls the engine down in 0.30 sec. The softer engagement rate not only reduces impact sent to the drivetrain, it will also be quicker at the dragstrip.
I invented the ClutchTamer so I could easily adjust the rate that the clutch pulls the engine down.
Grant