My thoughts exactly.
Your experiment is still invalid to the rest of us. No video? No pictures afterwards. What constitutes 50% strength for you? What is that in foot pounds? That was a very unscientific method you took to try and prove your point. Go find someone with real test equipment and try again on your own phone instead of destroying a phone in a store that someone may buy, because they will eventually come to macrumors and post about how they bought a bent iPhone from a store.
That's nothin. I busted out the gun show at Best Buy and told them I thought I could bend a Klipsch Reference speaker in half. I picked it up, lifted it over my head, screamed: "HULK SMASH!!!!!" and bent it like a piece of loose leaf paper (which is odd, because they're made of wood)...
And that was only about... hm... 30% strength. So I have to say I think Klipsch is using defective wood. I have no reason other than a fak... err.. real internet story I just mad... err... reported, but I'm writing a letter of disatisfaction to Klipsch right now.
On an unrelated note: I don't believe him.