Milestone: Number of daily tweets hits 50 million

In terms of activity, Twitter is experiencing meteoric growth. This year, Twitter members are sending 50 million tweets per day — an average of about 600 tweets per second. That’s compared to 5,000 daily tweets in 2007; 300,000 in 2008, and 2.5 million in 2009. Related The Los Angeles Times Nearly one-third of Congress members are using Twitter.