Right, but then people stay logged into Facebook throughout the day while navigating the rest of the web (and spend an increasingly greater amount of time on Fa

Right, but then people stay logged into Facebook throughout the day while navigating the rest of the web (and spend an increasingly greater amount of time on Facebook itself). I have no idea if Facebook ad revenue will surpass Google's (and neither does this article), but the way Facebook ads work seems much more in line with traditional advertising (Google seems like an exception, but a good and potentially paradigm-changing exception).