Google says:
Bounce Rate is the percentage of single-page visits (i.e. visits in which the person left your site from the entrance page). Bounce Rate is a measure of visit quality and a high Bounce Rate generally indicates that site entrance (landing) pages aren’t relevant to your visitors. You can minimize Bounce Rates by tailoring landing pages to each keyword and ad that you run. Landing pages should provide the information and services that were promised in the ad copy.
Ok, if this only counts from the index page…
But if a person arrives at a deep page directly, sees what they want and leaves, that would be a high bounce rate?
:tooconfus