Three groups of internet users are mainly responsible for driving the growth of this activity: social network website users, those who connect to the internet via mobile devices, and younger internet users – those under age 44.
Social network users Internet users who already use social network sites such as My Space, Facebook or Linked In are likely to also use Twitter: 35%, compared to 6% of internet users who do not use such social network sites.
Of those, 25% use Twitter or another service, up from 14% of wireless users in December 2008.
By comparison, 8% of internet users who rely exclusively on tethered access use Twitter or another service, up from 6% in December 2008.
Some 19% of internet users now say they use Twitter or another service to share updates about themselves, or to see updates about others.
This represents a significant increase over previous surveys in December 2008 and April 2009, when 11% of internet users said they use a status-update service.
Statistical analysis of the Pew Internet Project’s September 2009 survey data shows that internet users who use social network sites are more likely to use Twitter or another status updating service, independent of other factors such as that group’s relative youth or propensity to go online via mobile devices.
“Because Twitter happens in public and in real-time, we’ve had some challenges keeping up with and curbing abusive conduct,” the company noted in a blog post published today.I'v tried @episod trick who suggests to add get parameter following the URL...And it work.(https://dev.twitter.com/discussions/9005) But indeed, I guess there should be a tool somewhere in dev.twitter.com, for instance, to refresh cached URL, for us not to have to add get parameters each time we tweet the same URLs with new meta content...Is there a way, as for update link in Facebook, to force update of twitter cards URL content ? The same URL links to an updated content, including Tweet Cards Metas, but tweets that refers to that URL do not reflect changes of the landing page...An the Card in the tweeter time-line shows old content, even if we tested the URL in the preview tool...