(UPDATE) Twitter processes approximately 100k tweets per hour. See math below.
Here’s a compilation of recent stats on Twitter’s U.S. traffic growth…
Excerpted from Journal of the American Society for Information Sciences and Technology by Penn State Live:
- “20 percent of the tweets contain requests for product information or responses to the requests, according to Jim Jansen, associate professor of information science and technology in the College of Information Sciences and Technology (IST) at Penn State.”
- “With about six million active users daily and predictions of more than 20 million users by the end of the year.”
More on Live.PSU.edu here.
eMarketer reports on US Twitter usage surpassing estimates:
In 2009, there will be 18 million US adults who access Twitter on any platform at least monthly. That represents a 200% increase over 2008 levels. Usage will reach 26 million US adults in 2010, a further 44.4% climb.

“This forecast counts 11.1% of Internet users as Twitter users this year, a figure close in line with Harris Interactive and Pew Internet & American Life Project estimates of 13% and 11%, respectively, in spring 2009. In 2010, eMarketer expects 15.5% of all US adult Web users to use the microblogging service via any platform.”
More in the eMarketer post here.
Compete.com shows continued albeit slowing growth:

Twitter Demographic data via Quantcast. More here.
In a recent press release MTV stated, “Additionally, through the “Twitter Visualization” tool… MTV, social media monitoring firm Radian6 and design agency Stamen tracked more than 1.3 million tweets created about the show by the end of the premiere airing of the show (11:30PM EDT).”
Chloe Sladden, director of media partnerships at Twitter said in the same press release, “During MTV’s VMAs, Twitter experienced three times our average volume of tweets, and twice as many as during the news surrounding Michael Jackson this past summer.”
Doing the math… 1.3 M Tweets over a 4.5 hour broadcast = just under 290k tweets per hour. Let’s call it 300k per hour for easier math. If 300k tweets per hour is “three times our average volume of tweets,” then Twitter processes approximately 100k tweets per hour.