I can honestly say that nothing much has changed. The girls who were working the streets beforehand tend to be the ones working the streets today. They still have their drug addictions or baggage, call it what you will.
There are a few more brothels than their were before, but other than that, same old same old.
I suppose it has lightened the workload of the police as well!
http://en.wikipedia.org/wiki/Prostituti ... ew_Zealand