I am intrigued by the mic placement. On my titan when I use my right hand my voice is heard much less than when I hold with my left hand. Titan has mic on right side lower.
I agree that Nokia's build quality is pretty much second to none, but I'm sure those HTC's are just badly made prototypes. I can't imagine they'd actually release a finished product that looked like that.
I'm sure the actual device they ship will be much more polished. Lets hope so for their sake anyway.
I'm guessing that HTC's polycarbonate is injection molded while Nokia's is likely machine cut, resulting in the cleaner edges as shown above. One advantage to the injection molding however is that it ads a nice texture to the surface of the device which I have feeling will make it really nice to hold as apposed the glossy or light matte finish on the 920.