There's no tipping down here in New Zealand, thank goodness.
I'll never forget when we first moved down here, we had a couple pizzas delivered to our house. I paid the guy and gave him a $5 tip. He looked at the money and then up at me with a puzzled look on his face. I said, "It's your tip. Thanks."
He handled the fiver right back, smiled and said, "no thanks, have a nice day!" and left!
Kiwi's are known to be world travellers, and whenever they come back from visiting the States the two things they always mention is, 1)... having to always wait in lines and 2.) Having to tip.