Library Use by the "Well-Wired"

I thought this was an interesting study conducted by Pew. Though, I am wondering what they are referring to by "Library Use." Is it checking out books? Using the wi-fi? Using the databases?
From my own experience at the public library, we do have a lot of users who utilize the wi-fi but a lot of users do not have internet access at home.

I wonder who they surveyed...

clipped from www.nytimes.com The Well-Wired Use Libraries More By ALEX MINDLIN Library use is far more prevalent among people who have a broadband Internet connection at home or at work, according to a new study. The finding counters a decade-old assumption that libraries serve as a “bridge” for people who want to use the Internet, but have only dial-up connections, or no access at all.