I have a manual transmission. I live in Wv so there are a bunch of hills that aren't to friendly to the XFE but i get and average of 28. If I just do highway miles though I can get about 40-42.
I typically average 33mpg on a long highway trip - bear in mind that this almost always includes 2-3 WOT on-ramp blasts and a pass or two. If I hyper-miled the car I could probably hit between 35 and 40mpg average on a long trip.