Fun interview with Charles Q. Choi at Scientific American on the topic:

If you are one type of genius, could you have been another?

Check out the full interview here:

http://blogs.scientificamerican.com/assignment-impossible/2011/08/09/too-hard-for-science-could-michael-jackson-have-created-twitter/

Also, check out my Huffington Post article, where I explore the topic in more detail:

http://www.huffingtonpost.com/scott-barry-kaufman/michael-jackson-twitter_b_842469.html