A lot of people, mostly elderly, are still in the 5% to 10% era, as slumlord said. One time, in Las Cruces, an uncle left a very large tip- $20 then, for what would normally have been a $3- $4 tip for really good service but the service was horrible. I asked him why when a dime would have been more than that waitress deserved. He said simply, "Maybe it will encourage her to do better next time".
