Thanks for your reply. how was your situation? did you switch?If you received AOR, $550 from your application fees will not be returned. Now if you check Oct applicant they haven't yet received any AOR. So thinking as soon as you apply on paper will lead to faster processing won't always be true. So analyze the current situation before taking the decision.
Also I agree to what @xuan said, processing office plays a major role in your application timeline.