well Roy and HG are full of it. According to the 2006 census data there were 389,463 people who identified as NZers
http://www.censusdata.abs.gov.au/ABSNavigation/prenav/ViewData?method=Place%20of%20Usual%20Residence&subaction=-1&producttype=QuickStats&areacode=0&action=401&collection=Census&textversion=false&breadcrumb=PL&period=2006&javascript=true&navmapdisplayed=true&
and while there may have been an increase since then even at say 500,000 they are way off the mark.
Support is fine but the issue is Aussie claiming the NZ result as Australasian, I mean struth cobber 
Re the German’s that wouldn’t be a huge surprise.