Actually avg is good. In local as well as in long routes. It also depends on the foot as well.
If the car is mechanically sound, you should get good avg. Avg drops considerably if car is not maintained properly.
A badly kept car will return half the avg of what it should be.
I've kept Corolla 1.3 and also have swift. Swift returns better avg.
Don't fall for rumors and you'll get the truth.