How Twitter Use Has Changed, From 2009 to 2010

It's been a good year for Twitter. The microblogging platform has grown by over 100 million users this year and expanded its staff from 130 to 350 people. And it's rolled out major redesigns and improvements to its site, mobile apps and APIs. People who created a Twitter profile before January 2009 now account for just 4.7% of the total Twitter population. That's one of the findings in a new study by the social media analytics and monitoring service Sysomos that examines over 1 billion tweets from 2010 and compares the data with Twitter usage in 2009. So how has the influx of new users changed the ways in which Twitter is used? The results of the study suggest we may be disclosing more personal information in our profiles and following more people, but even as more people have joined, most Twitter activity still comes from a very small number of users.