Other countries: you get the waiter's attention when you want to order something. Normally, it goes smoothly and they leave you alone.
US: the waiter comes over every five minutes to check on you, annoying you and interrupting conversations. They pretend to be nice and overly friendly, and often flirt with you for money. Alternatively, they might forget to check on you, but social norms engendered by the behavior of the group that do make it seem rude to wave or call to get their attention.
Worst of all, the waiter is incentivized to turn over as many tables as possible so they do everything in their power to hurry you through your meal.
Edit: This is a more general comment that addresses the conceit that the tipping system is merely a way for restaurant owners to pocket more money for themselves. This idea is simply ludicrous, given the staggeringly-thin margins in the business. I have no words to describe my disdain for the kneejerk reaction to attack job-creators at every turn.
Japan is a good example. In the food service industry, establishments will usually put their own service charge which they think is reasonable onto the bill (usually a small amount). They don't expect (many will refuse to take) further tips because they price the cost to serve into it.
Japan's entire service industry always leaves me pleased.
Plus other factors...
Quality of service only makes up 1-5% of the amount of the tip received.
Furthermore, even if tips "insure excellent service," since tip pooling is standard operating procedure, then it doesn't accomplished that goal.
http://www.slate.com/articles/business/moneybox/2013/07/abol...
When I give a tip, it's a gift. I don't expect anything back from it.
I do tip more at places I frequent.