I've got a '13 too and I am around 75-80% city/residential driving. I am averaging between 27-28 mpg both computer and calculator. I've got 1400 mi on so far. I am more than happy with the MPG numbers considering I have a bit of a heavy foot (attributed solely to the fun that I have in this car).
<>< Gal. 6:14
April 2013 HOTM
2013 Ford Fun Weekend: Show Class Winner