[Judson]

To think about it, this isn't all that surprising

Facebook has to many users that a lot of people use google to get to Facebook (some just blindly clicking on the first link: http://www.readwriteweb.com/archives/facebook_wants_to_be_yo...)

To me it seems like Twitter just hasn't spread to the computer illiterate crowd, so this kind of graph is unsurprising.

[ChrisRicca]

Navigational search definitely has a lot to do with the graph. I don't think that's computer illiteracy, though. That's just how the normals use the internet ;) We techies are the fringe.

http://cdixon.org/2010/01/22/techies-and-normals/

I see the navigational search as an indication of mainstream adoption.

[Judson]

"navigational search"... I like that

[zacharypinter]

Side note: As much as a I cringe at using google instead of the URL bar when you know the site you want to go to, I find myself doing it far more often on my phone. For example, on a mobile device, it's easier to google for "Hacker News" than type "news.ycombinator.com"

[teaspoon]

Agreed. Not to mention countless other problems with using Google Trends numbers as a proxy for "market adoption".