Yes, break in and driving style are two big factors. I didn't get 43-45 consistently until about 3000 miles. Then, for some reason, I got another jump around 10,000 miles where I'd range from 44-48.

As for driving style, there's a LOT of info on this site about that. Simply said, if you race around town you won't get mid-40's either. A/C will drop your mileage, as will weather conditions (rain, wind).

Oh, and that screen is going to lie to you. Mine is on average 3.5 MPG higher than what I get based on actual consumption and mileage. If I end a tank on 50, that usually means 47 actual.

Hang in there - your car will come around.