I've also noted a creep in the suggested tip at the bottom of a receipt recently.
It used to be 15%, 18%, 20% everywhere.
I'm seeing 18%, 20%, 22% alot.
I've even seen 20%, 25%, 30%!
I worked as a bartender a long, long time ago so I always tip well IF the service is good.
But I absolutely don't get forced into it. And I make a point of not tipping at all if the service is particularly sub par. That used to happen once in a blue moon, it's unfortunately become more common lately.