Devils advocate: if junior officers are so busy would you say they should go through the meal lines first in order to get back to work sooner?
Ahead of the CO, yes. You seem to be interpreting that I am advocating that officers should go to the front of the line at clothing, which I did not explicitly say nor am I in one camp or another on this issue. I was merely replying to your remark that the CO/RSM is busier than "a junior officer." I would argue that a junior officer (and we'll make this easier, most Sergeants to Warrant Officer as well) are much busier than the CO/RSM. Like I said, check the parking lot, it's a real easy indicator. Another good indicator is the amount of mandatory golf days, PD days, coffee breaks, and other random "time-fillers" that get pumped out of the short hallway when the rest of us don't need anymore time-fillers. Perhaps my unit is back-assward from yours, it would not surprise me, I've been saying we are the back-assward ones for 4 years.
Now, to answer your question, I am not sure in what context you mean. If it's in the field, then no, because if there is a shortage then its the highest ranks that go without (and yes, that means Privates eat before MCpls, MCpls before Warrant Officers, and then officers, and the CO ought to be eating last). The troops are also the ones doing the physical labour and need the food. And it's just a leadership issue. Plus, the field is a lot less hectic than garrison and everything comes to a stop at meal time. However, I have had instances where I was busy and I just kept writing orders or preparing supporting plans and my signaller brought me a plate of food, which is no different than what I said earlier about the CO's tac-section going and exchanging a piece of kit for him or the Course 2IC getting his storesmen to clear me into the base while I continued to work.
If it's garrison, its a bit of a red herring. We do have two separate lines/eating areas. If we didn't, and I ate at the mess, I'd be showing up at the very start or the very end of lunch when the lines are shortest. For real time purposes (aka to stop speaking hypothetical here), when I don't bring a lunch to work on occassion, I go for lunch at 1300 when the lines at all the local eateries are non-existent.