Thanks. I've started doing that now that I realise. Since the Q & A default message tells us that we have to post something before seeing the contributions of others, it could be extended to "after your 30 mins grace period elapses".
You [or your site admin, if not you] could modify the language string on the line {qandanotify/forum} to include the note about the editing-time delay, that way you don't have to worry about adding it manually each time, it will just be there.