Almost all references I've seen to Moqtada al-Sadr claim he is 30 or 31. Yet, Omar, who's an Iraqi, says he only 23.
While it really doesn't make much difference, it does make me wonder about his support. I've seen reports that claim he's being supported by Iran or even an Iranian puppet. This seems much more likely to me if he's really only 23 if only because I would find it harder to imagine so many thousands of people throwing their support behind anyone so young unless they thought he had powerful friends.