The original article isn't very long. If you want to discuss it, you could, I dunno, try reading it? Yes, it is from google trends. Just like the data on yahoo and google itself that they compared it to. So no, there is no rational basis to assume that the data indicates people are getting more familiar with the internet.
Meaning: people that can't type "facebook.com" on the address bar and type it into google then click?
So... based on that, we can assume people are getting more familiar with the internet maybe?