Where are the tweens & teens?

Ever since a study by Pew Internet and American Life Project indicated that teens and tweens have been losing interest in blogging, particularly Twitter--basically spurning the desktop screen for their mobile device screen--I've had repeated client meetings whose primary user base are tweens and teens where twitter ideas get shot down because.

And, yup, there's definitely some compelling data to back up that belief:

8% of internet users ages 12-17 use Twitter.2 This makes Twitter as common among teens as visiting a virtual world, and far less common than sending or receiving text messages as 66% of teens do, or going online for news and political information, done by 62% of online teens.

That said this is evidence that tweens and teens are still using Twitter, but it's mostly young adults?

Using different wording, we find that 19% of adult internet users use Twitter or similar services to post short status updates and view the updates of others online.

Young adults lead the way when it comes to using Twitter or status updating. One-third of online 18-29 year olds post or read status updates.

So, if you've got tween/teen users, where should you focus your energy anyway? Mobile certainly. But what about online dollars? Where should that go? Tweens and teens are definitely still using the internet. AND still using Twitter. Albeit not in the same numbers as young adults.

Teens are not using Twitter in large numbers. While teens are bigger users of almost all other online applications, Twitter is an exception.

Here are some nice graphs from pingdom showing where some of those elusive tweenagers are.

Average social network age distribution

Age distribution on social network sites

Social network ages

Guess I'd better start learning more about Bebo...

What do you guys think? Are their other reasons for this? Should we be taking into account where these users are coming from? Bebo has more popularity in Ireland, New Zealand, and the UK than it does in the US. Are American tween/teens different from their counterparts across the pond?