Robert_Charlton - 7:29 am on Aug 3, 2011 (gmt 0)
From the article....
Asked at press event earlier this summer how often Instant Pages chose the wrong link, Google Fellow Amit Singhal did not say. But there will surely be many cases where the service renders a page that you don't click on, and this could skew traffic numbers for sites across the web. In order to account for this fake traffic, webmasters must tap into a new Page Visibility API [code.google.com] that Google has submitted to the W3C as a standard.
Using the Page Visibility API
Google Chrome (Labs)