11in 360 is what i use because I palm grip, have my entire arm from the elbow down resting on my desk, and have a huge mousepad.
If you claw grip on a dirty, small mousepad and are resting your wrists on the corner of the desk then of course you should adjust your sensitivity accordingly
Personally, I went from the latter to the former and I just went from a 5 in to 11 in just because that was what took the same amount of muscle effort to go the same distance
The setup all comes down to personal preference, and intrinsically that will affect your sensitivity