There are, I believe, multiple HN moderators; Dan is just the only vocal one. And among all the different sites on the Internet, there are multiple different moderation styles, of which Dan's is just one.
I don't believe that is correct anymore, and I think TFA is right:
> Hacker News currently has one full time moderator: Dan Gackle (dang), and formerly Scott Bell (sctb). Their comment replies provide a pseudo-log of Hacker News moderation.
I've never seen an anyone else besides dang comment that they are an HN admin in the past 5-ish years or so.