We were on Jewel in Nov. We had the first check in time and within about 3 minutes of leaving the counter, they started announcing boarding. Suites, Pinnacles, D+ and D were announced. After that they started announcing times which was funny because first boarding was 12 and they started with 1030 lol. It was 12 because it was the first cruise after a TA. So, unless you check in before boarding starts, you will end up boarding with the masses.