I've had my Verizon iPhone for four days now, and I cannot make the death grip happen. I think that it must only be applicable in areas with poor reception to begin with. I've been very impressed with the iPhone, it truly is a great device. Over the weekend I went to Best Buy and noticed that the iPhone was the only phone that was real and running. All others were display models with home screen stickers to show the user interface - how very, very lame!
My advice to the world is to ignore anti-apple BS and get an iPhone, it still is the best, and Apple isn't afraid to let you play with one. The competition want's you to just think they are....