Oh, give me a break! He is suggesting a FREE solution and you are suggesting the consumer spend 30 dollars and up on a case just to solve a design/manufacturing issue by Apple. Apple/Jobs has been pretty smug, condescending and generally not honest by this issue. After the engineers confirm Apple is full of it, I think he is being very restrained in his disdain for this situation. Jobs and Ives have begun to believe their own press and handed out a real boner that they need to own up to.
I watched CR video. Its seems to be a legitimate test.
However, after that it gets a bit silly and unprofessional. It seems that the reviewer is biased against Apple. My reason is because he suggests using a big piece of duct tape and then ads a snide remark that it ruins the looks.
If I were the reviewer I would have shown how any case will eliminate the issue. I would also suggest that a consumer could cut a small piece of household scotch tape if they want the phone anyways but do not want a case.
In the end a professional reviewer would state that "I do not recommend buying the iphone4 unless you plan to buy a case."