My partner and didn't put our relationship on fb for maybe six months or so... but even if we did, how would that have made it any less meaningful? I like the general 'what if' vibe of this, I'm (just) old enough to have some missed connections, but the superior tone is just a bit comical.
I think what they've forgotten is that the biggest reason things don't come together is the personalities of the people involved, or not even speaking out at all - which will happen regardless of the comms tech available.