I have to agree with Apathetic. We just sailed on the Fantasy on the 8th, & it was my 1st official "Platinum" cruise. Plus we were doing concierge for the first time so I couldn't WAIT to get to PC as early as possible. We arrived a bit before 10am to the garage which was still quite surprisingly packed. There really were not a lot of spaces open. We got a place on deck 3 and took our carry-ons to get in the line which was already snaking around from the elevator area in the garage, out to the edge and about 1/2 way down the side of that deck.
It was very close to 10:30 before they started letting any of the line onto the Deck 3 walkway across to the upstairs security. It took FOREVER. Literally it took us close to an HOUR to get into the terminal from the time we arrived. I have never had that much trouble getting into the terminal in any of our previous cruises. I do not know WHAT the issue was. And from where we were on the elevated walkway, I could not tell if the ground level was having the same issue.
There was no wait for checking in at the Concierge/Platinum desks at the back, but I was surprised to see about 5 parties already in the concierge waiting lounge since we had arrived so early. Weird..... it all worked out fine, as we were literally the 2nd couple to board the Fantasy but I wish I knew what took SO long to get us into the terminal after 10:30am..... hope you have a lot better luck with that!