So for all you saying FB is not the old thing and all the youngens you know are on it 24/7, I'll ask this simple question, where are you located?
I'm from the midwest here in MN and we're super slow to adopt. Coasts are always the first. Heck, ever here in northern MN I'm seeing everyone starting to migrate to Twitter or Instagram. I'm only 27 and I know plenty of people who are in college because we have a few colleges and 2 major universities with about 15 minutes of each other. So from what I'm hearing and seeing, Twitter & Instagram is the pairing choice. Sure they have activity on FB, but it's because they've linked their accounts to duplicate whatever is said (Twitter) or shown (Instagram) or heck, I'm seeing a huge uptick of Vine in the last 2 weeks. Personally I'm getting out of social media because I think it's a crock of ****.
1. Biggest time wasting of all time. Far surpassing TV a long time ago
2. You're friends don't give a crap about you.
3. It's the most self centered place in the world, especially FB.