That wasn't my impression in my six week stay in NZ. My impression was that Auckland and the surrounding area was saturated with Muslim and Hindi immigrants, along with resident Maori. I found it to be a little strange, clean but also run-down and cluttered with nearly empty strip mall immigrant owned outlets. I got out of that area (near the airport) and once I arrived in Hamilton, the country was to my liking. I crossed over the central range and enjoyed Napier, one of my favorite towns. I drove south, through Palmerston North (a dead quiet and oddly vacant looking place...boring?).
I liked Wellington, loved Nelson, and liked Dunedin. The wine country was less interesting than I hoped, but I enjoyed most (but not all) of my visits to small towns. I particularly enjoyed taverns and bars, and wistful glances at pretty young women.
Since my visit, I've sought to characterize kiwi's but found it difficult; they were friendly, but reserved...a bit thin skinned...not especially gifted in humor (although sufficiently gregarious when drunk). They are much more rule conscious than Americans (and I am told more than Aussies), horribly aggressive and rude drivers, and overly desirous of telling Americans what is wrong with Americans.
On the other hand, they keep their children under control, are very polite, and most are money conscious and desirous of making sure that I was not ripped off by others. The nicest people I met were those that repaired my van tire, changed my blown tire, refueled my van when I errored two miles from town, and a potter I visited. The least nice were those that misunderstood my inquiries as being judgmental, and had a bitter edginess and off-standing ness in bars.
And my final impression was that NZ has changed quite a bit since my friends visit in the 1980s, where the people were far more welcoming, friendly, and unbelievably generous to travelers. But one would expect that the advent of tourism and immigration would have its dislocative effects.