Thought I'd register so I could chip in. Got mine from o2 today through the post. Pretty pleased with that since I only rang yesterday. Right, impressions:
First thing I noticed was that when I put it on charge I could feel the current running through the phone, like a slight vibration to the touch. Anyway, charged it, set it up. No branding whatsoever that I can see except a blue o2 "bubble" wallpaper set by default to the background.
The screen to me looks amazing, individual pixels are pretty hard to point out and the colours/contrast are amazing. People go on about how deep the blacks are in AMOLED but the blacks on this screen look as close to "off" as you can get.
Installed about 30 standard apps such as flash, google earth, facebook, bbc news etc from the "top free" list all at once with just a slight hudder here and there and practically finished the same time I'd finished selecting things.
The shutter speed on the camera is amazing too, the second you press the capture button its done. No slight jump, no pretending to be done and then saving what happened half a second later. It's like an instant capture.
So finally I decided to test the "death grip" by downloading Wi-Fi analyzer from the market which shows a meter needle of strength. Sitting right next to my o2 router (b/g only, no n) it's fine, in the next room it's fine. Then when I turned the phone sideways it literally dropped to absolute zero
If I hold the bottom end of the phone with my right hand in landscape orientation the signal stays fairly normal, then I lay literally just the tip of a finger with my left hand on the top end of the phone and again, drops to absolute zero. Even tried setting Wi-Fi performance to maximum in the advanced settings.
To me this isn't "slight variation" on signal strength as HTC have said, or something that "does not affect the performance of the phone in normal circumstances". I literally cannot hold the phone in landscape mode without Wi-Fi dropping to nothing. It may just be that it's my handset, so I'm probably going to swap it for a new one and see if it's any better. Really disappointed though because other than that I think it's amazing and just thought the death grip issue was probably a lot of hot air and exaggerated.