Ask HN: is a bot automatically approving pending comments?

Every time I visit https://news.ycombinator.com/pending there are no pending comments. I would expect there to be at least some delay in the approval of new comments, but it seems to be instantaneous. I even tried submitting an obvious garbage comment under a new account, thinking that it would not possibly be approved, but it still went through.

Is there someone or something approving comments at lightning speed? Or has comment approval been disabled already? Or perhaps there is something else I'm not seeing?