If anything, the US has moved 180 degrees in the opposite direction in the past 15 years. This is largely a result of the growing inequality and huge increase in expense in major US cities. Up until about 20-25 years ago, 15% was the "standard" tip amount at restaurants, now it's more like 20%. Virtually every place I go asks for a tip now (even places like a bodega where the person behind the counter does practically nothing - I pick out my food myself, I don't need a bag, and I pay with my phone) as a result of the Square/iPad tip phenomenon, and tipping in many of these places was unheard of just 10 years ago.