I imagine there are over a billion people in China and Taiwan who would beg to differ ;-)
http://www.chinatouradvisors.com/UpLoad/Jiangsu/Suzhou/Food/...
Chinese migration isn't just limited to the USA...
Compared to SF (which has one of the oldest Chinatowns in the US... unlike LA's, which incidentally was ruthlessly bulldozed to make way for a 'required' freeway by racist local government) much of Auckland's Chinese population is recent, which is perfect. Recent mainland immigration brings real Chinese food as Chinese eat it.
SF is dealing with Americanized interpetations of Chinese food that persist from the modified cuisine of multiple generations of Cantonese immigrants distilled through American popular culture. You know:
(1) Paper box
(2) Disposable chopsticks
(3) Fujian/Guangdong style egg (yellow) noodles
(4) Canto-Americanisms like 'chop suey' (Mandarin 'chao cai') and 'dim sum' (Mandarin 'dian xin') and such.
(5) Total overuse of meats and a relative lack of vegetarian options
(6) Total overuse of heavy sauces (oyster, sweet and sour, etc.)
By contrast, despite an early presence of Chinese in New Zealand, just fifteen years ago you would be hard pressed to find any Asian food at all in central Auckland, and certainly there was no or next to no honest mainland-style Chinese cuisine available at all, anywhere in the city.
(Edit: What's with the downvote? Sheesh.)
for example in a single neighborhood you can find halal chinese, dim sum, szechuan, hot pot, proper roast duck, chinese bakeries, shanghai style dumplings, fresh noodles ...
the bar for comparison should be beijing, shanghai, singapore, hong kong, taipei, etc.