Transits in the last month.
First transit - used the 'original' Al Mourjan lounge. The main showers had a long wait. Was advised to go through to the quiet zone (located in the deli area) and was offered a shower straight away (as were brother, father and mother).
Second transit - arrived 1h late and departing C gates, so tight connection (about 1h20). Used the garden Al Mourjan lounge. There was a queue including 4 men but each were assigned a shower immediately, as were my brother and I. There are no toilets in the garden lounge showers, there were toilets in the original lounge showers.