Has Web 2.0 mainstreamed?

Via Mediapost, a just released Universal McCann study concludes:

Text messaging, blogging and social networking have reached critical mass, with more than half of adults now relying on at least one of these so-called Web 2.0 platforms for communicating with friends, family, or colleagues on a regular basis

I'm a little confused by the lumping of text messaging (mobile or Twitter?), blogging and social networking into a Web 2.0 bucket. I'd certainly like to get these broken out into separate categories.

Then there's this:

...among digital media's bleeding edge - adults 18-34 - social media now is the dominant form of personal communication media, with 85% of this influential demographic group relying on one or more Web 2.0 platforms to stay in touch with others.

That's a pretty staggering statistic, but again I'd want to be clear what the frame of reference is: are we comparing social media to the telephone (mobile and/or landline), e-mail and the like, or is this a social media versus mainstream media inference?

Finally, some very revealing statistics about blogs/blogging:

One out of 10 U.S. adults now publish blogs, up from just 5% a year ago. Among 18- to 34-year-olds, the rate is twice that, with one out of five publishing blogs, up from 10% a year ago.

And who's reading all this blog materials? Well, according to UM, everyone. The percentage of Americans of all demographic groups who say they now read a blog everyday soared between 2007 and 2008...

I gotta gets me a copy of this White Paper to properly quantify the latter point.