User satisfaction includes all of the relevant issues for a person, and in this test they were testing reading, so eye strain would matter to people.
People absolutely buy the iPad to read books. It may not be the only thing they do with it-since it is a multi function device. However reading books is a very large component of the purchase for everyone that I know that has bought one.
My graduate program just bought 65 iPads for the incoming class to read their books and PDFs. They bought those based on user feedback that people hate reading on the tablet and don't like hauling around forty seven pounds of dead trees. The majority user request was to load the reading on an iPad.
People absolutely buy the iPad to read books. It may not be the only thing they do with it-since it is a multi function device. However reading books is a very large component of the purchase for everyone that I know that has bought one.
My graduate program just bought 65 iPads for the incoming class to read their books and PDFs. They bought those based on user feedback that people hate reading on the tablet and don't like hauling around forty seven pounds of dead trees. The majority user request was to load the reading on an iPad.