Apple TV movie downloads ridiculously slow
I have a very fast internet connection and my AppleTV is connected via ethernet. I stream Netflix and Amazon movies just fine. I went to rent a movie, and the download time initially said 3 hrs, went to 4, and then slowly came down. I gave up; the next morning, it had downloaded. I've had previous experience renting movies, and you waited a few minutes for it to start the download, and then you could watch it. A few minutes vs many hours.
Is there a trick to getting this to work? Is it Apple's servers or something else?