lucy24 - 8:29 am on Nov 22, 2011 (gmt 0)

Can they even track how long visitors spend on a single page? Last time this subject came up, the impression was that most javascript-based analytics programs don't say. (It's easy to do, but not by means of a single piece of code within the page body.) They only track when someone arrives on a page, so any single-page visit counts as zero seconds :(