According to the Twitter blog, Twitter users were tweeting 5,000 times a day in 2007. By 2008, that number was 300,000, and by 2009 it had grown to 2.5 million per day. As of January 2010, the company is seeing 50 million tweets per day—that’s an average of 600 tweets per second.
And the counts do not include spam.
Read the blog post at Twitter.
