People, read the article. The conclusion is not as "terrible" as what you may infer from the title (we all think the worst I guess).
Basically, it says Levi's jeans are manufactured in several different countries, so that most likely accounts for the variations. And that some of the jeans she bought from Amazon were actually better than non-amazon.
Still. I prefer buying from the Amazon competition in my country. Amazon regularly sends me wrong items.