The Yanks on one of my other Forums think Starbucks is 'gourmet coffee' and that dumb Australians who don't tip wouldn't know good food and service if it hit them between the eyes.
So on that basis Starbucks will probably do really well in the US and not so well anywhere else.
Here's a sample from one of the Yanks on the subject of tipping and our low Aussie standards:
"If your server is not expected to do simple things like keeping your glass full, or attending to your table needs, why have a server at all?
It sounds like you've adapted your expectations to the lower level of service that evolved from a government subsidized (via mandates) salary structure, then taken pride in your poor level of service as a superior Aussie way.
A tip is a gratuity, not a charity. While both make you feel good, the former has a performance expectation while the latter aids society with no strings attached. If your intent is to support someone, be honest and call it a charity. If your intent is to reward someone for a job well done, then do so generously and call it a tip."