And I would be surprised if this prediction is even remotely accurate. Do you use Facebook? It is increasingly becoming the only website you need to keep in touch with your contacts/friends and it is the only website that I have ever encountered that actually makes Google search engine less relevant. My friends no longer tell me to "Google" something that comes up in a conversation. They just post the link with a description of why they might like it to their profiles.
Last but not least: they have done a really, really nice job with the website. As far as Web 2.0 apps go, I would put facebook second only to gmail.
What he should have realized is developing an opinion without proper experience was the mistake.
Remember where you are.
The most difficult thing in the world is to know how to do a thing and to watch someone else doing it wrong, without commenting. -- T.H. White