In their May press release Nielson/NetRatings tell us that 18% of online Britons are women aged between 18 and 34.
Looking at the graph, it appears that the split between male and female users of the internet is fairly equal, but in the over fifties more men than women are active online.
In the words of Nielson's chief analyst
"The Internet is no longer dominated by young male adults times have changed considerably and many will be surprised to see that women aged 18-34 are now the most prevalent group online and that a quarter of the online population is at least 50 years of age."
The BBC report on this story suggests that young women visit a variety of sites including those dedicated to fashion, family and lifestyle issues as well as social networking sites.
I have to confess that I find the figures for the under 18s surprisingly low, or is my perception of internet use amongst teenagers wrong?
In the light of the Nielson data it might be interesting to examine the age profile for male and female users of social networking sites.
Rory Cellan-Jones writing for the BBC suggests that as a 40 something Technology Correspondent he found it difficult to find friends in MySpace, Bebo, Facebook and Twitter. He concludes his article by deciding that he is too old to Twitter and too mature for My Space.
In the interests of research I have profiles in several social networking sites.
I have to agree with Rory.
I'm just too old and mature (and I'm older than him).