Yes, I saw quite a few people arriving already dressed for dinner, but there was no way we were going to sit in the car for nearly 6 hours in our posh togs. Ambassador also refused to budge for us, which didn't give a good first impression (although I know that other lines seem to have poor customer relations shoreside too).
Breakfast the next day was an utter shambles. We queued for some time outside the MDR, only to be told that they were only letting in people who had queued on the other side of the ship and we should go round and join the back of that queue. After a near-riot they did start letting in people from both queues alternately.