As someone outside of the US, I expect there would be such an uproar over here if we had to start waiting longer and longer for fb/twitter/youtube/etc pages to load, that people will just switch to a European business instead. Currently no one over here even talks about NN, but as soon as page loads increase dramatically and actually affect people in their day to day lives you can bet they'll switch. I imagine European businesses are scrambling right now in order to be the next big social network.