I agree with above posters: MDR default option is everything brought at one time - Palo default option served in courses. You could always request it to be brought in courses, but that might be a scenario where you would want to tip a few dollars per plate that they carry (as many people do with the complementary room service). However that is totally up to your discretion of course!
A few people above have mentioned Palo being delivered to the room - and I can confirm that upon my last sailing that was for the Royal suites only. Obviously things can change, but that has been our experience when sailing concierge!