Hour? We got 30 minutes. Technically 25 minutes with a 5 minutes passing period (to get to back to class). Even with the school taking staggered lunches that still meant 1000 kids on lunch. It could easily take 20 minutes to go t through the cafeteria line.
Though that was highschool. I can't remember middle/elementary well enough, though even then I really don't think it was an hour.