No problems with my iPhone 4. I was able to replicate this issue once, in another part of town, by burying the corner of my phone in my palm as the Internetz taught me to ("Now squeeze real tight, hold, and watch the signal bars!"). But holding it as I normally would I have no problems.
Is it really that hard to rotate the phone in your fingers by
2mm or so to prevent the corner from being covered by your fleshy palm? Really?
And while most (all?) phones have their antenna-killing sensitive spots, it seems only the iPhone's deserves front-page attention.

And is CR going to do this type of test with all smartphones (seek out the magical death grip/touch of death) from now on? I doubt it.
Seems like a tempest in a teapot to me. Had this not made the evening news, I doubt 90% of the iPhone users who are currently complaining would have even experienced a problem had they not been shown how to replicate it.
In related news, my iPhone camera won't take a decent picture when my finger is covering the lens.
WHY CAN'T APPLE DESIGN A CAMERA PHONE THAT WORKS THE WAY I WANT TO HOLD IT???
I'm also waiting for a golf club that will give me a good swing no matter how I hold it. Because I deserve it.
Apple should just give out free bumpers (a complete rip-off at $30 anyway) and put out the PR fire (surely being fueled in part by its competitors). It's not that hard.