I believe you'll find that term actually refers to the driver?
Not really - That's almost double the fuel efficiency, when you think about it.
I had to decline the offer of a free car because it was an RX-8... Owners at the time suggested 18mpg meant you were doing well, with 12mpg seeming to be the average.
How flippin' high are these windows, then? Sure it's a drive through, and not a walk through?