Yep.
My S4G build date was 6/2/11
Yep. I love everything about it although the screen could have been a little less... grainy shall we say. If you've seen it in person and like the screen then that won't be a problem. It's just as fast as my vibrant and thunderbolt when launching apps but it doesn't get bogged down like those two do. It just keeps chugging right along without slowing down. I've had rosie (the UI) relaunch once, and haven't been able to replicate it. It's also a dream to browse on. It might not be as smooth as a GS2 side by side but it'll pretty much blow most other handsets out of the water in that area. Gaming on it is nice too, and I find it's framerates are as good as the Galaxy S1 phones which is great especially given the extra resolution this phone has.
I can only produce the deathgrip by completely wrapping the phone tightly which isn't a natural thing. I think those that are complaining of the death grip need to not hold the phone like they're trying to strangle it. I also have big hands so that can't be used an excuse. When holding it naturally I get a full wifi signal all over my house which none of my other devices could do. GPS locks fairly quick, but not as fast as the thunderbolt. But it works to say the least, and compared to my Galaxy S1 it's lightyears better. Compass also works great.
It's wifi speeds are hitting as high as 17Mbs down and 14Mbs up which is pretty solid.
As far as "4G" speeds in my area i'm seeing between 7-8Mbs which is great although your mileage may vary depending on where you live. My Vibrant would only pull in speeds between 4-5.5 Mbs on a good day in these same areas. Verizon LTE in comparison blows t-mo's 4G speeds out of the water. It's consistently twice as fast as t-mo's. In real world performance it only launches youtube videos 1 or 2 seconds faster so it's not that big of a deal.
The build quality is amazing, and the best handset i've ever held. That includes the iPhone4. I showed it to a friend who has the Incredible and he was practically drooling at it's looks and how smooth the OS felt. I don't know about the design as it does allow a lot of lint behind the case. We'll have to see if that's becomes an issue with lint getting under the screen.
I've only had it for one full day now and simply love it. Sorry for the long post.