Online reputation company Rapleaf has released a new study of 49.3 million people, revealing gender and age data about social network users. On most of the main social networks - including MySpace, Facebook, Bebo, Hi5 - women outnumber men by a considerable amount. On Facebook, the 18-24 age group is largest, with 1,685,029 women in that age group compared to 977,753 men. In MySpace, the same age group dominates, with 7,091,214 women and 5,226,788 men.