I think that our good experimenter made the articles point. That is, OP sacks don't work as a primary defense for food. Reason dictates that you should NOT sleep with them, ever. Secondarily, was that dogs, could smell scents through them, though dogs were only a means, not the actual target of the study. Like heating a flask in lab, using a bunsen burner was not the point of the experiment, though it also proved the burner worked.
Scent, like vision to you and I, appears to be a primary input to bears, dogs and cats. I suspect this also means there is specific qualities that we cannot detect. Like the amount of food available, overall shape of the scent source, direction, and other things we are unaware of. We can debate this to some degree. Dealing with our lack of fundamental knowledge in this area is perhaps another science in it's own right, and, while mentionable here, should not be debated, here, though.
Since the real life target was bears, I would quibble that the experiment should have used bears for better relavency, but, dogs work as well given the testing parameters: easily mobilized, easy to handle, not dangerous and usable within the constrained budget & time. No doubt, there would be quibles about individual animals if it had been done with bears: caged/wild/jaded/etc. Generally, a well done experiment with provable goals. Personally, I tentativle accept the results with the caveate that repeated testing would include a blind target, ie, one with nothing in it to remove all sources of possible contamination.
As far as techniques to maximize food safety and personal safety (albeit indirectly,) these debates do not effect the experimental results. We can debate the merits of various techniques freely. Ryan Jordan, et al wrote of electrical bear bags a few years ago, I think. Canisters are pretty well established, though often derided. I hate to carry the d@mn things, myself. Hangs and techniques are a normal part of camping. Electric fences are well known, but, usually avoided due to weight and complexity concerns. Metalic skinned films have been known for many years, since the latter 60's when they discovered dissappearing water in fallout shelters *through* plastics. I am sure there are others...