First off, I am not a Facebook, Twitter or Instagram user.
When reading the "lazy journalist/blogger" reviews of WP8, they often talk about lack of apps. Microsoft states that they have 46 of the top 50 apps:
So what are these other "missing" apps that people are complaining about? You hear/read, "Well WP8 doesn't have Instagram or some of the other popular apps." but they NEVER state what those other "popular" apps are. I have listened/read IGN, Verge, Engadget, etc and they say the EXACT same line word for word, but never discuss these other apps.
Off and on, you here some specific game, but those usually last for a month or so, and then no one is playing it anymore...so to me, those don't count.