My car has had 700 miles to learn how I drive. Mostly highway, 55 mph, ECO mode on, but quite a bit of heater in the morning. I charged to 100% for only the second time since I bought the car. It showed about 84 miles estimated range. Charging to 80%, it shows around 67 to 70 miles estimated. I think those numbers are pretty close. Average speed probably 45, heater on in the morning. High beams on for about half the morning drive. I expect to do considerably better soon; shouldn't need heat much longer. Still, 55 mph seems to yield right around 4 mi/kWh.
I did 85 miles on the way home from the dealer, but that was with climate control and lights off. Estimated range 12 miles when I got home. Had low battery alert, which I have gotten used to.