I've been following this thread since the beginning. I think we have a couple issues going on here that obviously all come down to Netflix. Some people saw an issue after the most recent firmware update on their Apple TV. Some saw it as a general issue. I can tell you from my testing / observations that this is seems to be a Netflix / bandwidth issue, not necessarily a device issue. I also think there's some coincidence here as far as firmware releases and other changes, such as Netflix opening up Super HD to everyone.
I have 2 Apple TV 3s , a PS3, a PS4, an iPad, an iPhone, a PC, a laptop, and so on and so forth. I have Comcast, 50Mb/10Mb. Speed tests to various tools (there are a million out there, and they are all relative) indicate my speeds consistently at 50-100Mb down and up to 30mb up depending on the day / time. I have plenty of devices to test from, and my results are pretty consistent across the board.
As of the time this thread started, I too started seeing terrible quality on Netflix with no concrete evidence other than my own eyes. After reading a bunch of forums, I was pointed to the Example Short people are using as a guideline for Netflix performance. This short is a good guage in my opinion as its behavior and results obviously coincide with my own visual results as far as poor quality goes. I decided to do some more tests.
First I targeted my Apple TV 3 units. I then used my iPad, PS4, PS3, my PC, and so on. All these devices give me similar results in picture quality and change dramatically depending on the time of day. Consistently I get 5800Kb early in the day on each device. At night, each device is at 256Kb and ranges but never goes above 500Kb according to the Example Short.
After seeing this result, I decided to actually toss down some bandwidth monitors on the switch each device is plugged into when streaming Netflix. In my case I used SNMP bandwidth monitors. I had monitors up on the ports on each switch I have at home, as well as on my firewall itself. Keep in mind, my results to / from various Internet speed tests don't change much at different times of the day.
Times of good / HD quality (early in the day) produce speeds from Netflix to me at around or above 5Mbit. During peak times at night, the bandwidth from Netflix goes down under 1Mbit. While testing Netflix, I ran a few other streaming type apps. iTunes from the cloud gives me about 30Mbit. This is staggering, but also works slightly different than the other streaming apps per a previous post, as it downloads / caches more information than is currently being used. HBO Go is consistent during both off and peak times at around or above 5Mbit. Amazon Instant Video is the same at or above 5Mbit at off and peak times. This is the one that I'm particularly wondering about. Since both Amazon Instant Video and Netflix are hosted at Amazon, why would I get such dramatically different results from both services at the same time?
This issue across the board seems to be related to streaming during peak hours. Since the complaints here involve multiple ISPs I think we're looking at a Netflix infrastructure issue rather than a particular device issue.
Has anyone else done some actual bandwidth testing / monitoring and come up with similar results to mine?