I've read quite some windows reviews of the card, not a single one actually mentioned if DisplayPort works or not. Why are your standards for a small site like phoronix significantly higher?
Developers care about SM5, they want cards that can run their newest code. It's a real advantage to a graphics developer, right now.
If you really need to complain about little semantic details, DX11 support is not a "future" thing, the card actually supports DX11 today. It doesn't matter to you today, but this isn't an article about DX11, but about the GPU.
In this case the feature was even qualified with the phrase "if it matters to you". Duh.
Sure, you can say "But a GPU in 55nm with equal features is exactly as good". Right. But you're missing the point that an equal GPU in 55nm simply isn't possible.
From previous reviews I know how different cards compare (including nVidia cards). I have a basic understanding about the speed of a HD4870. With this comparison, I now have a basic understanding about the speed of the HD5770. That's all I wanted to know.
If you want to know more, you could try to educate yourself by reading more reviews. You could also try asking nicely, that usually gets you an answer. Or you can just make some unrealistic demands and then complain that they weren't met. Which is obviously way more fun.