Yep. See 62. Absolute fact.
My personal advice has always been to leave a little more if it looks like you're going to return soon. Anyone who thinks that waitress A doesn't tell waiter B who is tipping heavy hasn't tried it.
Two exceptions to the rule I did find in my brief tenure in this little world were (1) restaurants directing all tips to be placed in a common kitty, and (2) restaurants wherein the bussers shared the tips with the wait staff. In the first case contributions to that kitty became a matter of pride among the wait staff; in the second it was kind of an incentive-killer. My first experience with crypto-socialism. It didn't work very well.