The docs [1] seem to imply that it will do everything that will look like an impression, presumably you (or your ad network) will then need to use the visibilit

The docs [1] seem to imply that it will do everything that will look like an impression, presumably you (or your ad network) will then need to use the visibility API [2] or load your advertising as a POST. How do ad networks track that the webmaster isn't opening ads in a hidden iframe now? [1] http://www.chromium.org/developers/design-documents/prerender http://www.chromium.org/developers/design-documents/prerende... [2] http://code.google.com/chrome/whitepapers/pagevisibility.html http://code.google.com/chrome/whitepapers/pagevisibility.htm...