I don't know about the Facebook comments system because I avoid it wherever possible, but at least with the Twitter reply button, it prepends the ever-popular @

I don't know about the Facebook comments system because I avoid it wherever possible, but at least with the Twitter reply button, it prepends the ever-popular @OP. In short, a Twitter conversation can be replayed, or stitched together after the fact. From what I'm seeing with this thread, it doesn't appear that is possible with the Facebook comments (though I know that they DO have the '@' reference, sort of.)