Reposting this article from June. Turns out the future generation may be something to look forward to.
Honestly, I don't interact with teens that often, but when I do, they are generally nice if a little under-confident. They don't really say "sir" or "ma'am" that much anymore, but it's hardly a Corman McCarthy world on the way.
I think kids probably should be instructed to use "sir" and "ma'am" actually, because probably the main problem with intergenerational communication is that there is no formality established so we just don't know how to start a conversation with each other.