It's actually a combination of both, linear is of course best however both the unit and AD2 must have their volicity setting highest.
As well, to repeat what I read (wish I knew who wrote this so I could thank them) turn your volume higher than your normal listening level so when you play with normal strikes it's at the volume you like and then with harder hits the volume will go up, super dynamics.
On a end note, I messed up my kit so bad it was unplayable and had to do what we all fear doing.....setting it back to factory defaults...doesn't play all that bad now actually. And thank goodness I remembered how to set it so that kit 100 is my start up.