i am not amazed & for those who don't believe try spending time on international forums with lots of downloaders & you will routinely see such results.also just for information sweden has 1.5gbps(or 1536mbps) home connections & now-a-days countries like japan,south korea etc are also having 1gbps home connections not to mention many universities/offices/institutions abroad have gbps net connection(seen many 100mbps or above speedtest results & that too after the net speed is divided between hostels).
this speedtest from New Zealand is most probably done from an office/university/institute & not from home because as far as i know such fast home connections are still not available in US/Australia/NL/Europe(except sweden & maybe some east european nations).in eastern parts of world japan,south korea & hongkong have such fast connections available for home use.