Back in December of last year we reported on data from the Pew Research Center that provided a detailed breakdown of the impact that Twitter is making with the online adult population in the United States.

Pew’s research in December suggested that 8% of online adults were using Twitter, female users were slightly more typical than male, and minority internet users were significantly more prevalent on the network.

Six months later, what’s changed?

Quite a lot, according to Pew’s latest study.

• 13% of online adults now use Twitter (up from 8% in December)
• The male demographic has doubled in size to 14% (previously 7%), leap-frogging women at 11% (previously 10%)
• 95% of Twitter users own a mobile phone, and over half of them (54%) access Twitter in this way
• Non-whites continue to have a very high rate of adoption of the service – 25% of online African Americans use Twitter (11% on a daily basis) as well as 19% of Hispanics. This contrasts sharply with just 9% of whites
• Twitter use by the 25-34 age group has more than doubled, rising from 9% to 19%

As mentioned, Twitter use by 25-34 year olds (and 25-44 overall) has grown significantly.

Overall, however, I think the ethnicity data is perhaps the most interesting.

It’s worth noting that this data clashes significantly with an Ad Age study from last month. However, in the world of Twitter, that’s pretty much par for the course.

What do you think? Does this study equate with your own experiences on Twitter? Hit the comments to let us know.