hmm. fair enough. I have heard the short trip stat bandied about a lot. Having spent time with people in the suburbs, even close in suburbs, the stat makes sense... if you exclude commute to work. When I visit my parents in stroadville, a trip to the store is 2 miles each way and should be easily bikeable, but bike infra is non existent so everyone drives.
One note about the framing. The average US Driver excludes everyone who isn't a driver