Wow, I must be either doing pretty good, or driving like an old lady.
I'm getting 5.3 m/kwh on the main screen, and 5.4 m/kwh on the little display over on the right. This is over the lifetime of the car, I've never reset it. Also, I learned to maximize it back when my original battery was down under 50% original capacity.
Of course, here in Florida, I don't really run the heat and the highest hill is about 10 feet above sea level, and I try to limit the A/C as much as possible. I've always thought a fairly major contributing factor to the massive battery degradation seen in the hot climates has been the use of A/C as well as the actual heat, but I don't think this is an accepted idea among those more knowledgeable.