We don't have a TCH, but we do have both a Highlander Hybrid and a Prius. I can tell you short trips will KILL you MPG. We do a few trips in the mornings and afternoons to get kids to school and daycare that are less than 4 miles, and even in the summer (100+ degrees) it takes more than that to get the cars warmed up enough to get "normal" gas mileage. These Toyota hybrids warm up faster than a non-hybrid car for emissions reasons, too.

I agree with previous posts saying 40 miles per hour trips in the city are best for mpg, and then highway. It will also take you a little while to get used to driving the car. Rather, learning how to get the most mileage out of the hybrid system.

Those short trips will destroy your MPG - even if it's several a day but only a few miles each. This isn't unique to hybrids at all, however. You just don't have this feedback displayed in most normal cars.

Hope this helps.