IIRC, mine is about 8% optimistic. It is definitely between 5-10% optimistic, but IIRC 7.5-8% is where mine fell.
I can tell you at an indicated 130mph, the giant SHAD top case creates turbulence. Figured that out realing in a punk on a sportbike that thought he was doing something. Gave him about 350 yards, then closed on him. Believe he was like "WTF did that bike with luggage just do"