Interesting point from another Facebook Newsroom post. The News Feed is going to treat all Reactions as a show of interest. It'll try to show you more of the things that you react to. So if you click sad on everything, your News Feed will be sadder than a Nicholas Sparks story.
Twitter is a niche site, it's not built on appealing to everyone. It's by far my favourite social network, but Facebook provides a more populist service.
Analogy time: I feel like everyone thinks of Facebook and Twitter as Coke vs Pepsi, including Twitter's head honchos. Facebook have this unique combination that is massively successful, Twitter are desperately trying to imitate it.
They should look at it more like Coke and Sprite. Sprite offers a different taste, it's for us guys that like lemonade. Why not crush the lemonade game, rather than gun for Coke? (I know that Sprite is owned by Coca-Cola, the analogy doesn't run forever)
According to the Guardian, Twitter confirmed the worldwide outage by tweeting from their @support account. Realising the issue, they had to email the tweet so that news agencies could actually see it.
Link for those interested: http://newsroom.fb.com/news/2016/02/news-feed-fyi-what-the-r...
Let me know if I've got it wrong because I'm making this point to everyone I see.