Panthro - 5:04 pm on Sep 27, 2012 (gmt 0)
I remember Bingdude talking about how they only really see that immediate clickback reaction as a negative signal from a user. This article talks about the "magic" two minute mark. Seems to make sense as I think many people will use the back button even after they've found what they want or like what they've seen. Maybe a click through to an additional page from the same author may be seen as a very strong indication or user satisfaction.