This is probably a dead thread now but there is some real misinformation posted that I would like to comment on. A number of people have said that bounce rate is linked to the amount of time spent on a page, and this is incorrect.
When a visitor lands on a page and then leaves it without visiting any other page on the site, it is a bounce. They could be there one second, one minute, ten minutes or whatever, it makes no difference at all because Google doesn't know. It only knows how long has been spent on the landing page if the visitor visits another page on the site, because then it has a time stamp for the two actions, i.e. landing on the first page and landing on the second page.
If the visitor just exits, it only has one landing time so even if the page was open for an hour, it would register as a bounce and zero time spent.

Last edited by ozsubasi; 16Mar2012 at 18:12..