Half is the best you can hope for
Analysis from a web usability expert indicates that users read half the information only on web pages with 111 words or less. Then they only spend 4.4 seconds for each additional 100 words, and will read about 20% of the text on the average page. The dataset was capped at 1,250 words per page because “Pages with a huge word count are probably not ‘real’ pages anyway.” (Today’s Cyclingnews is over 2,400 words.)
I suspect that print pages are more closely read, but I don’t have any statistical basis for thinking that. If it’s true, I wonder if web reading habits are eroding how much we read on paper.
(that’s 109 words)
via ReadWriteWeb