Check out the Japanese city drive cycle for something *really* divorced from reality. Prius gets around 80 mpg if I remember correctly
I wonder how the Japanese public deal with the posted numbers when they go to buy a fuel-sipper. Perhaps they just compare vehicles one to another, and realize the car they end up buying will get around 60% of stated

R2-E2, 2G Prius.
Highway/City/Husband/Wife MPG:
56.5, as of 12/2005, 26K miles
Jac Nasser, Ford President: "We are planning to launch a hybrid version of
this car [P2000] within this year [1998]. We will also make FCEV available in
2004."