I don't think that is a very fair statement concerning testing to the limits ... after all, if I tell you that I get 30 miles to the gallon in my Saturn but then do a test on a Hummer and find out it is getting 10, is it fair to say that all car mileage claims are wrong?

As you point out, the report is focusing on cheap discs. I'm not sure what two technologies you are comparing, I may be missing the point you are trying to make.