I haven't driven a Prius, but there's times I've wished I had one for its all- electric mode and cool appearance. My commute is 50 miles each way, but if it were 11 miles personally I'd be driving a Prius if the driver space was comparable to the Civic.
I'm 6'2 and about 240lbs and I find the Civic's driver space is OK for trips of 400 miles or less.

I get good mileage, but I have to drive a special way to fully take advantage of what my car has to offer.
Regarding my daily commute the MPG starts very low and gradually works itself up.
After about 12 miles it is around 50-55MPG, but I only get super mileage after traveling about 30 miles, being mindful of everything I'm doing.

I'm only guessing here but I think the Prius has less of a cold-start MPG penalty for its electric mode which makes it better for shorter trips.

Efficient drivers do it better.
1003 miles a tank personal record. 74MPG calculated. HCH1 CVT