Entitled to more than a 20% tip or just entitlement mentality?

The other night, I took a friend out for her birthday at an upscale French restaurant.

The food is magnificent, as authentic as anything I tasted when I lived in Paris – cue the accordion music. But even perfection has its tics.

Normally, service at this restaurant is sublime. But this night, I had a problem. After having a wonderful meal and then calculating a respectable tip of 20% on a pretty e...