I was at a wedding last week in which I was with 9 other males from my high school graduating class. We are all approx 28 years old
Of the 10 of us:
6 NW1-2 (I've weasled my way back into this category with medication)
3 NW2.5-3 (I would be in this category without medication)
1 NW4ish I'd say, with hairline around NW3 but blatant crown balding
If you include my medication dependent self, that's at least 5 dudes/half the group balding to some extent. I put the NW1's and 2's together because not everyone exposes their hairline so I can't give exact norwood ratings
So still half are (natural) fullheads (if I had to guess I'd say none of these guys are treating their hairloss, but I couldn't say for sure)