I'm in the US, here's what most of my friends are doing:

* saying "fuck it" to Facebook and using Instagram as their primary means of communication to "everyone" * using SnapChat or WhatsApp for other communication * people are actually starting to text.

When I look at my FB feed, I see the posts of 10-15 people max. I do check people's pages just to make sure FB is not fucking me over (and sometimes it is) but most of the time, people just drop off facebook. They're not "leaving" but they're not using it.