Rob Horning heralds it:
With Facebook, shy people experience greater control over self-presentation at a pace they can handle. Users can manage the flow of social interaction, experiencing social life through a dashboard and time-shifting friendship to suit their needs. On Facebook, no one need worry about volunteering information clumsily or at the wrong time, or expressing enthusiasm with a little too much energy. You don’t have to worry about interrupting anyone or expect to be interrupted. You can’t misjudge the moment, because social media suspends spontaneity.
The Dish 