I'm also in NZ on TelstraClear cable, just upgraded to Warpspeed 100Mb. Nothing wrong with the internet connection, I'm getting 30Mbps down, and downloading an HD movie from iTunes it runs between 5Mbps and 7Mbps without any issues.
BUT, my Apple TV 2 has gone from instant download and ready to play, to a 45 minute delay before its ready to watch.
Looking at my firewall stats it seems that the AppleTV is limiting its download rate to a steady 4Mbps, even though there is plenty of bandwidth available it just caps itself at 4Mbps. This is in contrast to renting the same movie via iTunes on my Mac and the firewall shows it using between 5-7Mbps.
So this isn't an internet issue, its an Apple TV issue. The device is rate limiting itself for some reason.
Seriously its so bad I'm about to stop using it, which is a real shame because a month ago I loved my Apple TV and recommended it to everyone.
Also, it seems the list of movies available for rent on the Apple TV is now very limited, where as on iTunes there are many more movies for rent. Or am i just being paranoid?
There is a note in the iTunes help files that states:
Note: If you plan to watch a rental using Apple TV, you’ll get the best-quality video by renting it using your Apple TV. HD movies rented using Apple TV can’t be transferred to another computer or device. For more information, see the documentation for your Apple TV.
I wonder if the Apple TV movie version is different, perhaps a much higher bitrate with less compression, hence bigger file and longer download.
I'm going to try doing the network test on the Apple TV but I will tell it I have only a 2-3Mbps connection and see if it adjusts itself down to a lower bitrate movie file... maybe its the fact that it now has such a high speed connection it is trying to download too higher a quality movie?