Such a "rare" occurrence, where they only had 9 reported bends at the time that they commented about it, yet they felt it was necessary to improve the stability of the build. I don't know any company that would improve on a physical feature that had "minor" and "rare" defects. Clearly they lied about this "rare" occurrence.
I personally know about 10 people who's 6+ phones bent. My screen shattered inside my jacket pocket when I was walking. As visually pretty, and great internals are, the quality of the 6's build was just horrible. I rarely see a non cracked or bent 6/6+. I find it extremely unlikely that it is everyones fault and not the quality of the phone.