interesting.
I can believe Pete's comment that by removing wide weight the boat the boat became more responsive to steer. This means you could position the correctors to tune the responsiveness that you require. Wide weight would increase the Yaw inertia and I think would put a bit more load on the rudder when used to turn the boat.
From seeing the Deamons sail with ali racks I have'nt noticed any characteristics that differ from the carbon rack boats.