The graph compares the time taken by blind users and sighted users to complete tasks on three low accessibility websites and three high accessibility websites. Data plotted from Table 4 of the DRC's report.      

Graph showing that both blind users and sighted users benefit from accessible websites

Long Description: It takes on average 3 times as long for screen reader users to surf the web pages

http://userfocus.co.uk/articles/drc_report.html