My attempt at a "for dummies" summary of the issue here:
If you look carefully, the Consumer Reports tests involve placing end supports roughly 1/4" from either edge of each phone. Basically, all the phones are different sizes and thus have varying amounts of material and torque being applied between the supports and the part of the machine pressing down. A particularly long phone which yields at 70lb of force has actually performed better than a stubby one which yields at 70lb in this case. Hopefully I didn't just say anything too wrong or confusing, because I'm not going to notice until the morning...
If any phone is going to be subject to the same force at the edges, regardless of length, then that's what you want to be measuring. It doesn't matter if a long phone can handle slightly more torque than a short one, if it's going to be subject to a lot more torque.
I don't know what the stresses applied to a phone in a pocket actually look like, but it's not obvious to me that measuring force rather than torque is unfair.
This isn't a test of the materials though, it's a test of the phones as a whole. When I sit on my iPhablet it's going to have more leverage working against it than an iPhone 5.
http://www.instron.us/wa/acc_catalog/prod_list.aspx?cid=833&...
http://www.instron.us/wa/applications/test_types/flexure/con...
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My attempt at a "for dummies" summary of the issue here:
If you look carefully, the Consumer Reports tests involve placing end supports roughly 1/4" from either edge of each phone. Basically, all the phones are different sizes and thus have varying amounts of material and torque being applied between the supports and the part of the machine pressing down. A particularly long phone which yields at 70lb of force has actually performed better than a stubby one which yields at 70lb in this case. Hopefully I didn't just say anything too wrong or confusing, because I'm not going to notice until the morning...