Many clients do not know their left from right, and for them an excellent experience is actually pretty bad unless you know any better. Again, it comes down to what device the person is using. People watching on a PC usually get away with using a bad stream, and the quality on it isn't that great.
Can you guys get an Apple TV3 and use that for your Hulu and Netflix tests?
I think it would be a mistake to assume that. Especially looking at the market where our clients generally come from we generally see a high level of tech savviness amongst our clients. In any respect, as my dad used to say "I don't understand art, but I know I don't like it". If someone is having a horrible experience, their level of expertise doesn't mean they can't express or distinguish a good or bad experience for them.
We do run tests with Apple TV, but we do test primarily over PC so that we can get meaningful diagnostic data.