Yup. Once we had to start pooling our tips, you better be getting a minimum of 10%, or you'd get crappy shifts. 15% was expected, and to be a star waiter, 20%+ was the goal. This was partly to weed out the underperformers, but also to limit underreporting of tips by waiters. No one liked pooling, so they'd surreptitiously pocket a few tips.