Richard, I suspect that aog means the suggestion that magz aimed at teenage girls have increased such problems as anorexia etc.
As for the question, well I'm female, and having read magz aimed at both teenage boys and girls, I have to say that I think the girls magz are worse in regards their approach to sex, alcohol, etc.
There is one (girls mag) in particular (and I'm talking about 10yr ago, so it may be different now), that I used to buy, which had "position of the fortnight" (with instructions, diagrams and endorsements from couples who had tried it)! It also had a section of "embarrassing stories", most of which were readers writying in about the time they were so incredibly drunk, or the time they were caught having sex by ther parents etc.
and I know this mag was really aimed at older females, but was widely available to mid teens.
Girls magz should be similarly restricted IMO.