I have had some quite wild figures so far but yesterday I tried a (semi proper) scientific experiment.
1, Car on charge, full. I think that means the battery remains "pre-conditioned"
2. Drive to local shops, 2.2 miles, all down steep hills - so regen didn't want to play
3. Stop for an hour, then back home over exactly the same route, back up the valley
4. Temp was 10/11 degrees C
5. Seat & wheel heating only
Scientific experiment part two. Similar journey today, but across into the next valley, gaining altitude. But, colder (5 degrees) and zero battery pre-conditioning. Seat/wheel heating only but it came on at a higher setting.
This gave me 2.3 miles/kWh outbound and 3.3 inbounds, an average of 2.8 miles/kWh.
Weather's warmer in the Pacific Northwest. At 60 degrees F ambient temps, i was getting much higher mileage than in the past month. About 4-5 mi/kWh after about 50 miles of driving today. No use of AC or heat, mixed local and highway driving.