We get the EPA rating on both ours easily so their test seems to be accurate to me.
I too am disapointed by the small gains from the hybrids, I just sold my old 1988 Chevy S10 4x4 which would hit 27mpg because I needed something with a larger cab to hold a baby seat, why are the vehicles to today not getting 2-3 times the milage as vehilces almost 20 years old. To get that kind of milage I now would have to have a unibody front wheel drive.