I have noticed that under certain circumstances the "It's no longer needed" flag acts immediately on comments and they are straightaway deleted. Yet at other times this is recorded as having been marked for moderator attention and it's a little while before the comments are removed.
Assuming I'm not seeing an extremely rapid response from one or more of the moderators (!), what is the logic around immediate removal of comments vs flagging them for moderator attention? (i.e. how can I know when to expect one type of action or the other?)