So are they just "comfort" items? Can they just be removed and go without like the Standard and Classic?
I haven't ridden a Touring since the demo at the dealer in '08 but I do remember that the Touring felt a little smoother overall than mine. At the time I figured it was the extra weight and the narrow tire but it makes sense that they would add some rubber isolators to a bike meant for comfort.
I wouldn't think the rubber is all that important if it can be taken out and tightened down, might lead to more handlebar vibration though. My stock mouse ear mirrors were worthless over 3000rpm from the engine vibration, the sturdier billet stems on it now helped alot. They don't buzz nearly as bad as the stockers did.