I used to drive a Toyota Yaris - The closest thing I could drive close to a hybrid FE without even trying I think (heck, short of DFCO-ing and driving a not ridicously high speeds cause of fear :P, and I still got 38-39 mpg) . Unfortunately, I got got stupid and careless and had a car accident that totaled it.
Then I decided I needed a car with more safety features and got a Mitsubishi Lancer. Because it's FE is less than stellar (specially compared to the Yaris and I got spooked by the accident, I drive at the speed limit (setting the cruise control whenever possible). I've noticed that some people follow me, specially in the highway, and/or if they pass me, they don't get ticked off.
Who knows?