TelstraClear: You may like to consider the independent Truenet results. Truenet stated in its 6 Jan 2012 news release:
"TelstraClear Cable remains the best performer compared to all ADSL suppliers."
You can find more on the Truenet website.
Hope this is useful.
Gary
Truenet's testing is unrealistic. They test single page loads, wait for the speed to ramp up, and and various other "issues".
Also they are testing a web page that is in I think Wellington. When most people browse international sites like Facebook.
TelstraClear's facebook performance hasn't been amazing with multiple periods of time of "issues" like facebook chat not coming up properly - even though it was working on other ISP's.
New Zealand still lacks any realistic benchmarking of real web browsing and interactive performance.