To prove your point even more, I think you should all post a youtube video showing the problem doesn't occur on your individual phone. A simple 15 second video of you placing your palm over the problem area, and showing the full strength bars.
Or maybe some of us don't cup the phone like that so we never experience the issue? I don't get how some people use the "death grip" as it's been described when talking on the phone. It's extremely awkward.