Those figures are quite green, but they aren't class-leading, or anywhere close. In fact, the Hyundai Sonata, which is a size (or two) larger manages 35 highway.
Fuel-efficiency for Lancer SE and ES models has increased for 2011, thanks to the adoption of electric power steering. They're now at an EPA-rated 24 mpg city, 33 highway with the standard five-speed manual gearbox or 25/33 with the available CVT. GTS models rate 2 or 3 mpg lower all around at 22/31 or 23/30 respectively.