@geek was very unhappy with the WordPress commenting system, so its operation might have been.. sub-optimal.
The way moderation works in Discourse is very transparent, if there are issues with your post it'll get flagged by the community, and if it reaches the flagging threshold you'll get a PM about it. You can modify your post to correct the issues and have it reappear instantly.
Discourse is designed to be self correcting by the community itself (read: go away trolls and spammers!) even if no formal moderators are around, though having moderators does expedite things.
The general intention is that you'll get a PM if there are issues, either automatically or from a moderator.