It seems that this article is just a copy from the compete.com blog.
And I don't like the tone of this article. The analysis is way superficial. Other than the statistics(which is good), the only thing they seem to know is the appearance of kindle.
Ironically, that is exactly why I got a kindle. Over the past ten years, I spent way too much time reading online and I found the online material, while very broad and up to date, is very shallow.
Needless to say, I think my post is another shallow one with just claims and no proof...