I just discovered something interesting. NetFlix. No, not NetFlix itself, I know about NetFlix.
What I didn't know is they measure the performance of ISPs their clients use. This is great. NetFlix requires great gobs of sustained performance for at least the length of a program. Not just a short duration speedtest often from a node located in the actual ISP itself.
Here is their numbers for NZ:
http://ispspeedindex.netflix.com/country/new-zealand/
Next time I see one of those "which ISP should I use" posts, I'm going to respond this this link and let the poster do the work.