The Ti, if you have 18's, will get worse mileage than the others. I noticed a 3 mpg drop over my SEL. It will climb slowly over your first 3-4 tanks before you level out, assuming the same driving patterns/routes.
Also worth noting is the fact that any time you have the car reset or battery disconnected it will go through this process again as your car learns the world over...
FocusFest 2013: Best of Show
Gateway FFW: Show Class Outstanding
September '13 ROTM
Hatch Nation #161