Well, to be fair - the point about working with your board manufacurer to get is fixed, was very correct. When I contacted Netflix, I got "first line" support at first, so I got the old bandwidth/outdated drivers blah bah routine - but they did relay me to tech support eventually. I kind of figured the link when I came across someone with DTS-HD issues in XBMC. It helps alot to get answers, when you know "exactly" what you're looking for.
Hopefully Intel can push through this driver soon. Protected Audio Path integration is actually not a part of the HD Graphics driver at all. The Intel Management Engine Interface delivers this function, and that has its own separate driver. Or, well - it should have. DD+ (Netflix 5.1 etc) and DTS-HD bitstreaming is a no-go under Windows, without this driver. And Intel has not supplied this driver at all. Even a lot of Bay Tail desktop boards have not gotten it. (Please note: It is possible that Intel changed they approach to PAP with Bay Trail. Intel will need to confirm/debunk this. If that is the case, well - their solution is not working - PAP is still not present or broken)
I'm starting to wonder wether this is has been an extremely serious oversight, or a deliberate move due to marked reasons or hardware issues.