How long do you posts take to appear on the forum?

I've just posted in the HiFi Corner, and the post hasn't appeared yet. When looking at the list of forums, my post seemed to be there as the last one in HiFi Corner, but here we are ten minutes later and it's still not there.

Is this due to my 'past record', or have I mentioned something naughty in the post? In which case I can't get in there to edit it. It's a little annoying, because it took a while to type on my iPad lol.

Oh well. 

Tony