He lives in Wisconsin. I remember several of my cars were a good 2 mph slower when I lived in Michigan versus east coast tracks. Bama has offered to let someone run on the same day at the same track with anyone's tune versus theirs, to date no one has taken them up on their offer.
My Bama tune versus stock ran nearly 4 MPH faster on the same day and .4 faster. I seem to remember a MM&FF article showing an AED tune running 3 MPH better than stock with the same test.