The concept of body types, ie ectomorph, mesomorph, and endomorph, is predicated on the idea that different people have different proportions to the length/diameter of their bones. So, if you're a tall skinny dude, you're going to have a longer trigger finger than a tall hefty dude. Obviously there are a million combinations of everything to do with the human body (and mind for that matter), but the pattern would emerge that ectomorphs would be on the high end of trigger finger length, and endos would have the shorter lengths.
I'm not sure comparing measurements on a gun forum will help to debunk any stereotypes the liberals like to perpetuate
I'm in your tall category (6'0") And my trigger finger measures 72mm.(left hand) Contrary to my wifes opinion, I also have opposible thumbs, and my knuckles are not worn from rubbing the ground, thank you.
She may be right about the Oldtimers thing, though.