Yes, that's exactly the one I'm talking about
And yes, we are more of a melting pot here in NZ than other countries are. Especially with the children of many Asian and Polynesian migrants now being born as first-gen Kiwis.
There are still some very very strong beh norms around marrying within own cultural group, though. I would venture to say Saamoan, Tongan, Niuean are particular examples of this. It is also very tied up in the way the families are structured - finances are a good example. Basically, as I'm sure you know, families contribute to different 'funds' which are then used communally. You might contribute to your parents' funds, your aunt's funds, and your partner's uncle's funds. It is a very complex system and is one of the key reasons there is so much debt - people give a lot of money that they don't have, and the loan sharks go nuts over it. And then there is church-going ...
So I guess if you are going to marry into one of those cultures there is a lot of adjustment to do.
NZ is going to have a HUGE problem in 25 years time if we don't fix some of the social issues that are bubbling under the surface. A hui I went to recently was fascinating in terms of korero about what steps need to be taken. The more pessimistic feel that there will be white flight AND brown flight (sorry about the un-PC terms).