The issue here is exactly the same as the issue with posting your own content to social news sites. If what you have to say has value, posting it adds value to the service. There's nothing more to it than that.
Not following hundreds of people, not "retweeting" other people's comments, not replying to people, and sending mundane messages (by who's definition?) doesn't make you a narcissist. It makes you someone who is using Twitter primarily to publish and not so much to listen. Sorry, drama queens, there's not much more meaning you can layer on to it than that.
I highly disagree with the author here. I don't use Facebook for data portability and privacy reasons. I also have limitations to what I can stand on Twitter. I want to follow tweets throughout the day and not feel overwhelmed each time I update.
Therefore, I follow close friends and some hackers I respect. I don't follow Lady Gaga or Ashton Kutcher or Starbucks just because "Twitter isn't Facebook."
In other words, why does the author think that your social network should affect your standards?
EDIT: But I still dig the article for pointing out what a tool Ryan Seacrest is.
poor article, IHMO it is up to each user how will he/she use the service