In Information Foraging: Why Google Makes People Leave Your Site Faster, Jakob Neilsen compares web browsing with animals hunting in the wild:

This is one article that I can completely agree with. In watching myself, Jason, Alex, even novice web users, I see all of these cues. Even my mother in law will become frustrated if she can’t find what she is looking for. Her ‘preferred’ hunting ground is the bookstore, in the magazine section, so she will revert to that. My only hope is that Google and others do get better. The concept of a sticky site should come from the worth it provides to the community, not from flashy looks, or preventing the back button, etc. Here at dotnot, I don’t even have anything on my home page yet, because I am resisting posting anything that is non-essential. I worked hard to make the HTML of my site simple, I want the content to be just as simple, and convey the necessary information without all of the fluff.

And here is a definition:

Popularity: 10%