A little mileage report so far; dealer delivery (it had to be brought from 330 miles away, which the dealer did by swapping a vehicle with another, so it was driven rather than transported) followed by my pickup (dealership through a mess of city traffic with flooding delays and road construction, followed by 50 miles of 45mph tollway construction speed limit, followed by about 30 miles of 80mph, followed by a lot of stretches of steady speeds ranging from 60 to 75, most of it in heavy rain, yielded 37.1mpg, up to about 720 miles on the clock. Since then I've 39 mpg on one tank over about 250 miles, and then about 38 on a top-off tank that includes quite a few short hops. This last round includes climbing a hill with a 30 percent grade, which the car elected to do without downshifting. Quite impressive, although it makes me more inclined to override with the paddle shifters on hilly roads.
It does not seem to be able to get 40mpg at 70mph . . . so far. It clearly does get that at a steady 65. Most of these numbers are with air conditioning on.
How long does it take for the mileage to settle out? Part of the problem is so much gas in the Midwest is addled with ethanol and a lot of it is off-brand too and you wonder about the consistency of the quality.