If you've ever looked at the git repo (I look at it every couple days), there's quite a bit of activity going on it - lots to say the least. To bash them just because they can't get 2D out by the end of the year even though it visibly shows that they are working away at it is ... shortsighted I would say? Lack of patience? Overdemanding? Unrealistic?
Maybe they shouldn't have said they would have 2D done by end of the year, but hey, if you've ever developed before, delays usually happen.
AMD itself also has a decent relationship with OSS to my understanding, and their processors have worked well with Linux.
I should also mention, specs WERE released. Were they complete? No. But did they release something? Yes. Actions speak louder than words, and while we all have our doubts, I'm willing to give them the benefit of the doubt this time around (given that they have released 2D specs already). The next thing we know, when 3D specs are released (hopefully), people will complain that they can't get DRI soon after, therefore everything AMD spews is a complete lie.