I'll add: even if he is speaking for AWS with some authority, he certainly doesn't speak for the rest of Amazon. I've seen some teams with _really_ bad practices (security and otherwise.)

As for your comment about the writer, the entire website feels very "off" to me - no author listed, no "About" page with names/links, nothing to give this credibility. I did see the link to the cofounder's Twitter page, so at least there is someone behind it, but it is pretty well hidden.