I don't have an answer to the question but thought Annie Heckenberger's comment to Max Kalehof's post was funny:

I’ve noticed a surge…and consequently a mass exodus of their core users. My 20-yr intern summed it up best: when I asked her why she deleted her facebook profile/account this week, she said, “My 6th grade cousin tried to friend me on facebook and that was it. Facebook’s over.”