Google is changing and have changed its algorithm too and because of this many of the authenticated websites were badly affected.
I do treat this that they are doing for the well being of the Internet – as they have treated the link directories few years back and they were affected – but still directory business is in existence and the directories, which were actually link farms were badly affected.
It is the same condition now with the article directories – ezinearticles and other article and blog sites, which are badly affected due to change in google algorithm, were actually doing the same thing.
Bad of Article Directories
The reason these were shredded in this algorithm change is because the content submitted to their directories were not good enough. Also, the content was mostly duplicated – so in no way it was doing the authority work.
Moreover, these kinds of article directories and blog sites were actually being treated as link farms – just as it was with link directory.
Now the time is to change, you cannot think of doing SEO depending on article directories. It was considered good at times when link directories died.
So, next time when you opt for SEO of your site – give a small chunk to the article directory submissions and give majority to the other tasks such as blog comments, social bookmarking etc.