Netflix isn't using AWS for their bandwidth. The media files themselves are being served by Level 3's CDN (http://www.reuters.com/article/2010/11/11/us-levelthree-idUS...). Netflix is using Amazon for a lot of their application servers, but when you're serving as much bandwidth as Netflix is, you go with a CDN for media distribution.

That's not to say AWS is bad or anything, just that AWS isn't supporting all that bandwidth for Netflix.