I don't think that Twitter having any sort of paid service model would correct any of the beef that the author has got with them. I use Twitter on a pretty frequent basis just like the author claims, but have very few of the same arguements. The "Who to follow" section for me is always fairly accurate, suggesting individuals who are posting useful and cool information similar to what I already read. I've had very few UI problems with either the web client or the iPhone app. Kinda just sounds like the author either didn't really use it enough to find it useful, or just griping about simple problems that all social network sites will eventually face.
I read through the entire article. Very fascinating. I admit that I don't understand but more than 5% of what is being explained here, but it is a VERY in depth look at how things are mapped out. I wasn't aware that operating systems were so wasteful in the area of redundant resource management. Mad props on this article.
After reading the article, it kinda sounds to me like Dvorak just can't see Facebook's relevance as a communication tool for people who aren't super skilled with computers. I'm not really a fan of Facebook myself, but shantanubala is right; It does help people connect and share information easier. I wouldn't agree with Dvorak that Facebook is a ghetto, then again the definition of the word "friend" seems to be a little different these days.
https://twitter.com/57un