User time on web pages

Jakob Nielsen summarises some new research revealing more about how long users typically spend on web pages. Basically an interesting and detailed piece of work that can be summarised as, 'not very long at all, almost all of the time'.

Nielsen says:

Users often leave Web pages in 10–20 seconds, but pages with a clear value proposition can hold people's attention for much longer... To gain several minutes of user attention, you must clearly communicate your value proposition within 10 seconds.

How Long Do Users Stay on Web Pages? - article by Jakob Nielsen