I checked in the other thread - AOR's are only starting to come in now for online applications submitted in February. so it's not surprising or concerning that we didn't get ours yet. We were apparently supposed to have received a confirmation email though. Mine could have landed in Spam, I didn't check it at the time (as I didn't think I needed to be on the lookout for one), by now it would have been deleted. When I log back in the online system, though, I am told that it was submitted successfully.
Agree on the frustration part - I am patient and it's okay if this takes a year or two even, just want to know that everything is in order and that they have my application. It really would be nice if they could just confirm that.