We seem to have drifted off into a discussion about the Beatles' sheet music, which is fine, but I can't leave the original topic alone. The most important reason to learn the "nephew" fingering (pinkie on the high-E string) is to get used to using your pinkie. Taking short cuts to avoid using the pinkie is a bad idea, because then you'll never develop the facility to use it in any of your playing. I'm all in favor of learning and using multiple versions of common chords, but make sure you're doing it for the right reason. We're only given ten fingers, and only half that number on the neck -- it would be a shame to eliminate one right off the bat just because you don't want to spend the time to learn how to use it.