One thing I think this really puts to rest is the measurement methodology Kinsey would have used, and it's definitely bone-pressed to the maximum with a measurement along the curve. This is pretty much in-line with with Wessells which bone-presses to 6.2" as well.
I think the old 1940's Dickinson and Legman data are pretty much rubbish though. They were seeing 14" long dicks, yet the average circumference was 4"? 4" around is fairly thin. Not absurdly skinny but much thinner than I'd expect an average to be.
Blunt for power, bottle for show, but prow for finesse. I'm a prow :)