Greyhound

My wife and I got our 2015 Outback the end of December and love it. The vehicle does everything well so far and we are following the manuals recommendation on break-in for the initial 1000 miles. The one thing I am noticing though is the MPG and I am not sure whether to be concerned or not. The MPG is averaging around 20 MPG driving easy city miles. Since the stated figures are 25/33, is the reduced MPG due to new vehicle conditions?