New to me 2021 e-tron

Premium, 20"s, 40K. Good inspection. Motors dry. I sold cars, including Audi for many years. This one is very clean. Very happy with it.

Long term history showing 1.9 miles/kWh. Depending on the trip, short term has been from 2.1 to 2.4.

I wonder how many miles it will take for my lighter foot to impact the Guess-o-meter?