Yup! "Stomp and release" driving kills MPG . . . On my Gen-2 going from TX to MI (a lot of which isn75 to 80 MPH or get blown off the road) I can still do my first day 750 mile freeway leg with no issues, and typically see high 40's to sometimes cresting 50 MPG on the slower 2 lanes up north. I don't typically bother checking for in town driving, but open road, mine seems pretty much unchanged (and has had the first fix, and then the fix for the fix as well . . .)
Drive it like ther ]e is an egg between your foot and the pedal (or use cruise) and mileage will come up. Frankly, I don't feel like I am doing anything out of my norm - it's just how I drive. I was taught that driving should be smooth, and any sudden move/accel/decel is an error (especially in snow!) and it really helps on all my vehicles (I get just about 20 MPG on my diesel 2011 RAM 2500 on the same trip, at 8500 lbs empty . . .).
It works . . . and my wife (more of a stomp and relrase driver) can't even get close on the same road in the same car . . .