Status update services catch on with Gen Y were more likely to tweet than users ages 30 to 49, who had previously been considered the core group for Twitter.

Status updaters were more likely to belong to other social networks in addition to Twitter, and users with multiple Internet-connected devices participated in services such as Twitter at a higher rate.

College students remain the single most connected demographic group in the US. In 2009, 95.7% of them will go online at least once a month.
In less than 3 years college student frequency using social networking sites has doubled. Maybe we can consider the growth of the devices from which they get connected.

Why Miley Cyrus said Goodbye to Twitter ?
Teenage pop star Miley Cyrus has released a homemade rap video on Youtube explaining she wants to regain some sort of 'normal' private life.

I'm just noticing the video was uploaded on October 9, 2009 and we are 3 days later ... with over 2 million Youtube views.

She declared on her website "Twitter is not the only thing I am cutting back on. This is not an attack against this particular site, I just think kids all over the world could maybe take a little vacation from Cyberspace. My problem with the internet is it makes negativity so available. It allows people to anonymously hurt others without any consequences."

It's pretty relevant.

Are teens more social than social media people ?

Visit her fan page also: http://www.facebook.com/MileyCyrus