Good point. But still, it's not that 90% of all listed products are fake—it's 90% of the ones that Apple selected to purchase and test. Given that they only purchased 100 different products, this isn't a huge sample.

It would be interesting to know how many they looked at on Amazon and decided not to purchase (presumably because the appearance and price were not suspicious). That would shed more light on the true percentage of "Apple" chargers/cables on Amazon that are fake.