I think it depends on your habits. Facebook is unreliable for social interaction on a deep level for me because there is a negative cycle of reinforcement based on poor data.
My closest friends are the ones who I want to hear the most about, and yet for some reason, their updates are the ones I see the least. Part of the reason was because my feed was flooded by people who used Facebook voraciously, though I considered many of them only acquaintances to whom I was connected to keep in touch, but nothing more (i.e. Facebook is my social rolodex, while LinkedIn is my professional rolodex).
But I'll comment on what's in my feed, and so I'm interacting with those for whom I care less. That interaction is recorded by Facebook as saying, "Look, these guys must be good friends, they're interacting with each other." So Facebook sends me more of their stuff, giving even less opportunity for my closest friends' stuff to pop up in my feed.
It's no wonder that with my closest friends, we rather use email for our interactions, which ironically further reinforces to Facebook that I'm not close to these people: wow, look, these people don't interact at all, they must hate each other! Let's not send him any more updates from those people! Path was an interesting idea for intimacy, but why sign up for yet another service when email is so easy and already proven? We even tried setting up a private Facebook group titled Posse to stop using email. Didn't work for various reasons.
I still log into Facebook because I enjoy seeing what's up with people, etc. But I never go there to interact with my closest friends anymore. That ship somehow sailed a long time ago, and I'm not going to go through a manual process of ranking people to a special group, or anything like that, to fix the issue. Ironically, as Zuckerberg once famously said in response to Circles, "We found out that people hate making lists."