I'm bullish too, but any comparisons to Facebook are lazy. Snapchat and Facebook are completely orthogonal (the closer competition is Instagram, owned by FB, and Snapchat, but even then I would argue it is lazy to say they are direct competitors, ignoring the Instagram Stories product).

For better or worse Facebook is a piece of social infrastructure and utility. Everyone has Facebook. All the groups I know of are organized through Facebook. All of the events. And so on.