So I'm now at about 1,700 miles, of which I'd say probably 1,500 miles or so were in Sport mode. Based on my measurements (tripometer and gas fill up readings from the station), I've averaged almost consistently 21MP (between 20.7 and 21.5MPG). I've achieved this despite the energy flow screen saying I'm at 24MPG each time. Has anyone else done similar data collection/verification? Note that during these measurements, I never put the car in Stealth mode so that is purely Sport-driven MPG (an apples to apples comparison).