Quoting Tarynosaurus Rex:" I actually had no clue that the nachos were going to come up at the same time as the entrees. I saw ... [snip!] ... we had a bit of a rush and that I wasn't expecting their entree yet and they were still jerks. There is only so much I can do."
Me personally, if I had that issue with "fast cooks" and people wanting appetizers or salads first, I would ring in the appetizer or salads or whatever, get it served, THEN ring in their entrees. In bigger restaurants where apps are ordered more often, that's actually how they train is to do it. You take a drink/app order and ring it in. Bring the drinks, run the app, take the food order, they munch on app while entrees are being prepared. I would never ring it in together and just put a note. Even if they order it all at the same time, I ring in the app and their food doesn't get rung in until their app is up to ensure they have time to eat it before the cooks start on their food.