I can promise you that would not be the case. A vast, and I use that term lightly, majority of servers are high school educated at best and if they know their tip is automatic the service will suffer exponentially. Been managing in the industry for 7 years, if put in a position to make your own tips you work so much harder than if it's automatic. Some of you will agree, when you go out with family or whatnot and the group is large enough for the auto gratuity, the service is not up the same standards than if it were just 4 of you.
Thinking back years and years ago if I didn't leave with 18% of my sales after tipping out the bartender I had a bad day. 16% would have killed me.