Here's some of what they found out: 
 
 Old people tend to babble--length of status updates was the best predictor of a user's age. To get these results, the company used 68 word categories from the Linguistic Inquiry and Word Count (LIWC) Dictionary, a textual analysis program that identifies parts of speech (like prepositions and articles) as well as content (such as religious references or terms that indicate a strong emotion). Updates with negative emotions receive more comments than those with positive emotions, probably as friends race to console each other. Last week, Facebook's data analysis team published some interesting facts about its users based on an analysis of 1 million status updates from English speakers in the United States. Younger users were also more likely to swear, express anger, and use the word "I." Religious terms, social processes, and family were also more common among older users 
 
 Kids skip words--there was a strong correlation between age and the use of articles and prepositions. People tend to use the same kind of words in status updates as their friends--particularly if they're referring to their family, using religious words, or swearing. Unsurprisingly, status updates with more positive emotional words receive more likes, and those with more negative emotional words receive less likes.
– You can learn a lot when you’re listening to 550 million people. Using linguistic software, Facebook analysts investigated what people were saying in status updates, and came up with a number of interesting trends, Business Insider reports: The oldsters chatter quite a bit: Status update length was the best way to predict age. Older people also tend to talk more about religion and family. The young, meanwhile, leave out articles and prepositions, tend to curse more, and use the word “I” frequently. Those who use “you” a lot tend to have more friends. People have positive outlooks in the morning, the time of more upbeat statuses. After 10pm, there’s a negativity surge. Negative status updates garner more comments than positive ones. Friends use similar vocabularies, especially when discussing family and religion or using swear words.