+1 When I was a server during my college years, I had on occasion tables with Europeans, who I would chose to serve [instead of having another server take that table] -- I still remember one table of older Germans whom I'd provided extra service above and beyond -- who then proudly handed me their tip saying "here for you, you've been great" -- it was a dollar or two, far below even 15%!! Now, I know they thought they were being kind and tipping well, but if we'd had the amount of common tips on the bill, it would have saved them from severe undertipping....or devil's advocate, if I wasn't as good a server as I thought -- at least, if I knew that they KNEW it was undertipping, they couldn't have hid behind a lack of knowlege.

+100% on "complains about tipping" -- I know no one raised in the U.S. who complains about tipping at restaurants and I've lived in many different states and have been friends with people of varied socio-economic status.

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I've had good and great service in some European and U.S. restaurants and occasionally bad service at other restaurants in Europe and the U.S. I'd say I've slightly more experiences with bad service in some casual European restaurants but ime, a country with tipping doesn't necessarily have better service.