There is a great deal of variation in the age, sex, race, and educational attainment among those who use different SNS platforms. 

• Nearly twice as many men (63%) as women (37%) use LinkedIn. All other SNS platforms have significantly more female users than male users.
• The average adult MySpace user is younger (32), and the average adult LinkedIn user older (40), than the average Facebook user (38), Twitter user (33), and users of other SNS users (35).
• MySpace and Twitter users are the most racially diverse mainstream social network platforms. However, a large proportion of users of “other” social network services are racial minorities.
• MySpace users tend to have fewer years of formal education than users of other social network services, whereas most LinkedIn users have at least one university degree.