There is a McDonalds I frequent which has a 30 second guarantee between 11am and 2pm. I haven’t timed it to the second but they are fast and I’ll be darned if they don’t get my order right each time I go. I wonder what this location is doing that the others can’t or won’t.
Probably a corporate store. they follow all the rules and tend to do all the things right... except make profit. Corporate doesn’t care if their stores make profit, they just want them to show how awesome the rules are.