I worked with a group at Facebook, and I almost refused to take the project on. I'm the type that has deleted me Facebook and uses a blocker to stop their tracking, and when I showed up to work with the team, there were surprised that I didn't have an account.
From what I could tell, the teams are fairly isolated and thus don't see the forest for the trees. When someone points to an article like this, it seems that they just shrug it off and think the author probably got it wrong because it doesn't seem that way from the inside (again, they only work in isolated teams, but still think they have enough of an insider's perspective to discount it). Even huge companies we know now as bad had a ton of employees, like Enron.
I would really like the perspective of someone "on the inside". Facebook is one of the companies I trust the least with my data, yet they have so much talent that I can't help but wonder how they convinced them to work there (is it just the money?).