Yeah, except at least where I'm from, a "yes Ma'am or yes sir' is usually liked more than just "yep" or "you've got it."You can skip the names. Can I take your order, please? Will there be anything else? The Sir, Ma'am, sweetie ect.. doesn't have to be said.
Though I've also been sneered at that "y'all" is a rude way to talk.
It's just words, and it's literally how I speak, but people act like I'm spitting on their baby sometimes