Facebook's Product Strategy: Decisive, Distracted or Disaster?

A year ago at the WSJ's D Conference, I was at a private dinner with a dozen VCs and founders of note. One famous attendee lamented to me that their daughter was on Snapchat all the time.
"What's that?" I asked, always on the lookout for the next Rapportive (bought by LinkedIn), Uber (crushing it), Gowalla (Facebook), Wanderfly (TripAdvisor) or GDGT (crushing it) to invest in.
"You don't want to know," they lamented.
I downloaded it that night and had that moment of dread that exists only after you have children in the world. If you're a parent, tell me if you've ever had this thought: "Why would anyone build something like this?!?!? Oh yeah, they must not have kids yet." I know I'm not alone in this thought.
Fast forward a year later and Facebook has copied Snapchat with Poke -- which is the slang word for intercourse in case you're over 34.
Facebook is very proud of this product, so much so they've leaked all kinds of interesting nuggets to the press like the fact that -- gasp! -- Zuckerberg wrote some code for it and -- whaaaaaaaat?!?! -- he voiced the sound effects in the app!
Also, Facebook's PR machine can't seem to shut up about the fact that they copied Snapchat in just 12 days. Twelve days!