Age? I think one of the good things about the relative anonymity in HN is that things like age aren't usually seen as a factor in rating someone's contribution to a discussion.
[And I say that as someone who definitely belongs to the "grizzled" end of the spectrum].
It's hard for me to take a kid's advice on managing a company, vs a grizzled veteran. Then again, like with any advice online, it's caveat emptor.