Some highlights of comparison of Twitter usage between 2009 and 2010 include:
* Users with 100+ friends have increased by three-fold to 21% since 2009.
* 22.5% of users accounted for about 90% of all activity.
* 80% users have made fewer than 500 tweets.
* Justin Bieber is one of top two-word phrases and top name in user's bios.
* Significantly more users are disclosing their location, bio and web information in Twitter profiles.