Very unlikely, In the old days of Limited Speed Zones it was a simple matter to issue tickets like that, now it requires a court case and any decent defence lawyer will make proving it beyond reasonable doubt almost impossible.
By the way, I was once driving a Police car to a job at night in the poring rain on the Auckland motorway. I was doing about 70km/h because of the conditions. Some guy passed me in the outside lane going around 100. Even though I felt it was dangerous to go faster I would have had a hard time proving he couldn't.
Canterbury Uni did a very good study on this a while back.
A family ( not sons) received a ticket for similar in I think 2013, he was P* off but paid it. However the NZ Police are professional and tend to be lenient in these circumstances. It probably comes down to how you talk to the Officer if he/she pulls you in. Be a dick tp
them and they will be less likely to be lenient.
I guess what it all comes down to driving has with it large responsibilities and is a community activity, the public roads are not a play ground, to many Kiwis do not take driving seriously.