I agree with several of you, but have a different take.
I like my speed (when I need it) but really like the MPG I can get cruising. My RAV4 V6 has the best of both worlds. Racing should only be done on the track.
On topic - I'd like to see the data available, with the disclamer because of the self reporting.
My soapbox is; I'm one of those people who think cell phone use in the car should be banned for the driver except for hands free, but you should still pull over and stop if it's going to be a long or involved call. Had way too many people wander into my lane or ignore their turn on a 4 way stop while their hands are up against their heads. I had pulled over once to take care of some urgent email/voice mails from work while I was driving on vacation. Had the hazards on and was typing away when there was a knock on the drivers window. I hadn't even noticed the trooper pull up behind me with his lights on. He took one look at me and said "Thanks", then left.