People have mentioned buffet queues previously, but I can report it all seems fine now. Any short queues move quickly. In fact I would say there is less queueing than for the self-serve buffets on other ships, because the staff can serve people briskly whereas if it's left to passengers there will inevitably be some ditherers or physically challenged people who serve themselves very slowly. Also on the plus side there's less waste and mess, and more hygiene.