The current Hybrids deliver less fuel mileage at Highway speeds than do regular producion vehicles.
Not to make excuses for them, but the manu's are using hybrid tech to improve performance, not to squeeze mileage. They claim that's what sells (probably does).
But we'll see how they perform when platforms are tuned the other way.
It was mentioned on this list before (we're in deep OT here, I guess I'm making it worse) that for REALLY short trips, why not use hybrids as pure elelectrics, and charge 'em from the wall when you get home from you 10 mile round trip shopping spree? And save