Earlier quoted context omitted.
I don't know, I've had pretty bad service recently at places where you tip. I still top 20% out of guilt, but it might be that service in general is poorer now.
When did tipping 20% become standard in the US? I was talking to a colleague about this recently and they mentioned it but I could’ve sworn it used to be 15%
Although based on some recent news articles I found when I tried searching for a more definitive source, tip amounts have gone down in the past year or so.