Re: WAIT! Hang on, back up a second ...
"I hired an eGolf with Zipcar recently. 160 miles left according to the computer. Turn the heating on, dropped almost instantly to 106 miles. So probably 30%, give or tak."
That's terrible. We lose less than half that in our leaf. But I suppose it depends on the weather - if it was very cold it may be different. In the UK we tend toward wet and chilly rather than properly cold and I don't really like temps above 18C anyway.