I just got home with the game about two hours ago.
Yes, I've said multiple times I was going to wait for a performance test, but I saw it in the store and I couldn't say no.
I'm partway through the first "real" mission, and I'm having a blast. So far, it really does feel like Thief. I gotta disagree with what you said about the loot glint, though- I definitely noticed it, and although I think it's going to be helpful for distinguishing loot from junk for some items, it's also called my attention to loot I would have missed otherwise, which I don't like. One was a goblet sitting in darkness that I overlooked until I caught the glint, and the other was something I saw through a window, glinting from a rooftop across the street
But I really am enjoying it. A lot. I just have to force myself to put it down and finish Thief 2 first (almost there)...