MakeItALarge I don't think the issue is that simple. All the children in my class have a very specific idea of which toys and books are correct for their gender. The boys would not be seen dead reading about princesses or anything to do with girls.
It is not just parents who influence their children. Their peers have a huge impact on them. Send your son to school with a Barbie if that's what he wants, but I guarantee by the age of 5/6 he'll be getting bullied for it. If that doesn't send a clear message that you must stay within the realms of gender-specific behaviour, I don't know what does.
Recently, the boys in my class have been reading a superhero book aimed at kids. They constantly shout out about how one lad or another is "looking at the dirty pictures". What are the dirty pictures? Yes, the one of the women in tight, superhero type clothing. The men are wearing it too, but it's the women that are dirty to them for wearing tight clothing.
And how anyone can say "I don't think the toys I played with/messages I received as a child had an impact on me" is beyond me. EVERYTHING has an impact on us, it is impossible to separate any of it out and say what influenced us and what didn't.
Beyond that, the gender divide is, in my opinion, getting wider. The women I live with (all 5 - 10 years younger than me) are so much more interested in their appearance than I/my friends were. They are forever fake-tanning, waxing, getting nails done...it just wasn't on my radar at all. Overt displays of gender seem to be really fashionable and I think that this pink stuff will make that even more noticeable as children grow up.