What you read is incorrect. I participate on a number of streaming devices message boards and the first thing the engineers tell someone that is getting mixed results on quality is that different devices can pull from different streams. Optimizing the DNS usullay fixes it.
I also have experienced partial or complete outages on one device but everything was fine on another. I own 7 different streaming platforms. Boxee Box, Roku, ATV, iPad, PS3, computer, and smart TV.
You can probably google what I read. Three doctoral students did some kind of crazy research. Sounded pretty extensive.