I find it uncomfortable and hate the way it's creeping into au.(You'd be surprised that most don't expect Aussies to tip)
I think you're right John, discussed tipping with the barman at the Beverly Hilton LA. He said "Australians don't tip"; I didn't prove him wrong .
To me, CA (and apparently a few other states) are different to elsewhere in the US as they have abolished the low "tipped " wage rate. But are the so called maids different? Don't know.