To me, the story is not as much about Twitter, as it is about Drudge's influence. I remember that when Michael Jordan came back after playing baseball for the Birmingham Barons, NYSE companies went up by a reported 1 Billion dollars. See his wikipedia page. That was a lot, but nothing compared to the 5 billion lost in the last 24 hours on no real news.
It goes back to a post I did earlier last week. Matt Drudge has huge economic clout. I said in that post he might be the best bookseller in America. Probably bigger than Oprah and he might even be able to give President Obama a run for his money. I'm sure the folks at Twitter dreaded being the lead story on the Drudge Report because Drudge giveth and Drudge can obviously taketh away.