Agree! He already has tremendous amount of attention,press and users. If he iterates fast, and keep "freaks and fuckers" off the site, it could become mainstream(maybe it already becomes).
Getting the "freaks and the fuckers" off the site doesn't prevent the service from doing something new.
I think the idea of being connected to people one-on-one is appealing and don't think the appeal will fade.
If only if there could be more serendipity with who you are connected with... I think that is an interesting opportunity right now.