I've gotten 24.1 on a mostly highway tank, on mostly flat land. I get low teens around town, which is the bulk of my driving. Only have 2,300 miles so far though.
Here is another link with information and a video on the new setup:
http://social.ford.com/our-articles/auto-show-coverage/2012-ces/preview-of-the-latest-myford-touch-upgrades-and-enhancements/