I've seen the effect you describe also in the Philippines and other developing countries I've visited. Some Filipinos don't seem to realise that FB is just a walled garden on the internet, not the internet itself.

Also, I think your second point contributes to this: mobile is huge in the Philippines, they send more texts than any other country. And on top of that, social ties are a lot stronger than those in America, especially familial ties, with many siblings, cousins, etc.