I just posted a new post and followed it up with a now-deleted test post, and both went through in three-four seconds after I clicked on "Submit".
Edit: Well, ten-fifteen seconds, anyhow.
We're getting there.
Well, I don't know about that. I just submitted a post and gave up on seeing the submission go through. However, when I went back to that forum's home page and reloaded the page, my post appeared.
Post-post: the above post happened normally, but the one in the Audio, Video, Photography Forum was greatly delayed.