Demographics on Social Networking Sites

According to studies, 22% of the time spent on online, is spent on social networking sites. But, it's interesting to learn the stats behind the users of the sites…Here are a handful of interesting facts.
Demographics by Age
Did you know that the fastest growing demographic on Facebook are senior users above the age 65? This comes as a surprise for many, however senior citizens are utilizing social media more than ever. What are the reasons? Basically to be able to connect with loved ones, find people from the past or search for online organizations for concerns for instance chronic illness. One of the most prominent generation on social media nonetheless, remains age group 25-44. Facebook has 46% of its users age 25-44, while the percentage for the very same age group for Twitter is 57%. The age group 45-54 is constantly gaining ground on social networking sites. It is more dominant on Facebook that Twitter, with 26% and 18% respectively.
Demographics by Gender
Women surpass men for most social networking sites. For instance, on Facebook 54% of the users are female and on Twitter the proportion is 52%. However, on the professional site LinkedIn, 58,9% of the users are male. Google+, one of the newest sites, is totally ruled by men, with a whooping 74% of the users being male.
It's interesting to discover that men and women have totally different sharing habits on social networks. Females are 600% more likely to share content associated with partying and eight times more likely to share one of their favorite love songs as well. Men however, are more likely to express feelings about parenthood on social networking sites than women are. Additionally, men are not afraid to project a more "nerdy" side on sites than women do, since they are 10 times more likely to share stories about buying their first computer or about getting bullied when they went to school. Both men and women however, equally share content on career aspirations or more personal feelings such as self-doubt or worries.
Demographics by Education Level
Most users on social networks have a high education level. On Facebook, 26% of the users have a minimum of a bachelor's degree, while 55% claim having no less than some college education. The education level is even higher for Twitter users, on which at least 37% have a bachelor degree and 49% have some college education. YouTube is also a social networking site with high education level users. 51% have some college education and 26% of the users have at least a bachelor's degree.
Demographics by Income
LinkedIn is the social networking site with the wealthiest users, since 71% of the users make at least 50K per year. On Facebook, 66% of the users have an salary of 25K-75K and on Twitter 52% of the users make at least 50K.
What do you think about this information? Are any of them surprising?