(from Jakob Nielsen) "Web users spend 80% of their time looking at information above the page fold. Although users do scroll, they allocate only 20% of their a

(from Jakob Nielsen) "Web users spend 80% of their time looking at information above the page fold. Although users do scroll, they allocate only 20% of their attention below the fold." http://www.useit.com/alertbox/scrolling-attention.html http://www.useit.com/alertbox/scrolling-attention.html The article includes the results of an eyetracking study, and a few examples of viewing patterns where people did spend a lot of time below the fold.