On the average Web page, users have time to read at most 28% of the words during an average visit; 20% is more likely.
The web is mostly visual I guess. My most popular posts on CR are those with a high visual content.
And on those you agree to pages —
In research for the book Prioritizing Web Usability, we found that people read only about 10% of the text that they supposedly “agreed” to.
So what it boils down to is this, a page will get 25 seconds of your readers time plus 4.4 seconds per 100 words on that page. How much of that information do they read? 20% on average. Readers will consume 50% of your text if you use 111 words or less.
So to get people to read more you must write less. Oh, irony how I love thee.