New member here, in case anyone is interested. I track my mileage with Fuelly and have logged over 6,000 miles to date since I got my 2015 Sport back in October of last year. I've noticed actual calculated mpg is around 1-1.5 mpg off from the trip computer. See link below for my fuelly profile if anyone is curious. I'm located in Iowa for reference. Hope this helps.
http://www.fuelly.com/car/ford/edge/2015/a-aron6/860665