Consumers have an ever-expanding set of choices for social-networking, and Twitter, Instagram and Pinterest are finding a niche among different demographic subsets, according to new research from the Pew Research Center's Internet & American Life Project.
Pew Study: Blacks Over-Index On Twitter; Whites On Pinterest

The study, an expansion of a similar study on Twitter in 2010, queried 1,802 people on their cell phones and land lines over the course of a month late last year.
Here are seven takeaways.
Black users over-index on Twitter.
Twenty-six percent of black internet users surveyed said they used
Twitter, compared to 14% of white users and 19% of Hispanics. (In
2010, Pew reported that 13% of black internet
users, 5% of white users and 18% of Hispanics were using on
Twitter.)
Blacks and Latinos also over-index on
Instagram.
Twenty-three and 18% of black and Latino internet users
respectively use Instagram, compared to 11% of whites.
Pinterest is the whitest social platform.
Eighteen percent of white internet users are on Pinterest, compared
to 8% of blacks and 10% of Hispanics.
Twitter is most popular among
urban-dwellers.
Twenty percent of people living in urban areas use Twitter,
compared to 14% in the suburbs and 12% in rural areas.
Pinterest is more popular among better-off
people.
Twenty-three percent of people with household income between
$50,000 and $74,999 use Pinterest, as well as 18% of people who
make more than that. Just 10% of people who make under $30,000 use
it.
Instagram has become much more popular than
Tumblr.
Tumblr has been around since 2007, but just 6% of people surveyed
use it. Thirteen percent use Instagram.
Facebook is used by everyone everywhere -- even senior
citizens.
Thirty-five percent of people 65 and older use Facebook.