deadsea - 12:17 am on Dec 19, 2011 (gmt 0)
I don't like the term "sticky". My biggest site is anything but sticky. It has 1.2 page views per session average, and users spend less than 30 seconds on the site on average. But it satisfies them with the answer the wanted. For your site, sticky might be a good indication of user satisfaction, but that certainly isn't true for my site. I rely on other metrics.