Okay, I've collected more data.

I am posting three things:
o Link to the video referred to below, on YouTube
o The PingPlotter graph made while recording the video
o A screen capture of a speed test immediately after recording video

In the video you will see the kind of performance I get on Netflix. You can also note I get 3 dots quality not 4, in the screen capture you can see my download speed is very good. I think this suggests the problem is not on by end as Netflix keeps insisting. In addition to this abominable performance after starting a movie it stops periodically to do some catch-up Forgive me for the exceedingly poor quality of my video but I'm and old man with serious tremor.

Though the Target Name says Amazon it's not -- it's Netflix. You can verify that by putting the IP in your browser and going there.

It's my hope this will give you enough information to figure out what's wrong.

The video is Here :