My understanding is that HN's moderation involves some discretion.

I actually submitted this 13 hours ago, not 1 hour ago. Take a look at my profile. Curiously, the front page shows 1 hour.

Regardless of that discrepancy, fvrghl's post was still prior to mine, as it's from a day ago. I'm not sure what's going on with the time stamps.

Check that. 17 hours ago. Still doesn't explain my ability to submit the link.

"Interesting" posts that don't make it to the front page are sometimes revived.

I once received an email asking me to resubmit a link to something considered interesting, as part of a kind of trial for whether it should be the norm on HN. The behavior is now built in, so you don't need to interact with the system for your link to come back if it's "interesting".