Facebook is more popular than anyone gives it credit for. twitter is absolutely not more popular than Facebook. Facebook has lasted longer than MySpace and it will likely last a while longer. 10 years? not sure about that... but that's only if you look at Facebook as a social network. it's not just that. it's a company. if they evolve they will last.
Maybe, but not before twitter or tumblr
The 2000s kids here is starting to take over fb & I'm sure they're smarter than those dumbs who don't think fb is not cool anymore because they know how to prevent their parents from seeing their stuff