US market research firm AYTM have just published an excellent infographic, Branding and how it works in the social media age, which has some handy statistics for modern marketers.
I have paraphrased a few of the best stats here or you can look through the entire infographic by clicking on “read rest of this entry”.
1. 85% of internet users have Facebook accounts; 49% are on Twitter
2. 74% of internet users use Facebook daily; 35% use Twitter daily
Source: AYTM Market Research