Being using social media sites for almost 5 years now, I would say that Twitter will win.
Why?
The competition: Facebook and Google both make things too complicated. First of all, they don’t give a proper list of your own stuff where you could delete anything you have written earlier and don’t want to have available any more. Twitter has a single stream which has *everything*. You can delete anything and everything at any time.
Sometimes openness is best privacy.
We’ll see…
