i think this is very weak for two reasons. 1 is that you are trying to establish a correlation from 6 datapoints, which seems laughable to me. 2 is that i reject the idea that head in parking is any kind of indication about delayed gratification. its easier to go forward in to a tiny space than back in to one. with either method you gotta go backwards at some point. i guess pulling out face first might reduce parking lot accidents, but i bet backing in increases how ofter cars next to you get dinged. it seems very shaky to claim that one is obviously superior and the other is a product of laziness.