So, I assume most peoples beef is with the use of the word "most".
I mean, lets be real here, twitter and facebook (and similar things) are very narcissistic. 99.9% of posts on those site don't say anything relevant or meaningful, its just people talking about themselves.
Twitter is used incorrectly by many narcissists, yes. They can pollute timelines in a hurry. There's a lot of junk, spouting off, and nasty opinions. But unless you're Pavel, the world doesn't care what you had for lunch or the size of your child's most recent bowel movement. In other words, they're doin' it wrong.
I don't think this encompasses 99% of twitter's users, though. You just have to know how to sift through the garbage. Those of us who use twitter for work and recreation find it to be informative, convenient, and useful on a daily basis. For example, it serves as a terrific aggregate for current events, whether they be sports, politics, or entertainment.