An article by Fast Company (http://www.fastcompany.com/blog/kit-eaton/technomix/attention-marketers-80-twitterers-are-narcissists) recently summed up an interesting study about Twitter users.

They found that there are essentially two types of Twitterers.

1- “Me-formers” (about 80% of Twitter users) post mainly trivial, self-indulgent, and possibly narcissistic information about themselves.

2- Informers (about 20% of Twitter users) post useful information or post links to useful information.