Whilst I absolutely agree with you there Ullium we have a had the experience of bringing-up twins, one of each sex, which has proved enlightening.
We have tried to treat them exactly the same and seeing my 5 year-old son walking off to school dressed as a pink fairy does bring a smile to the face!
However, for the most part, and in spite of our conscious attempts to be equal with each, Sally likes dollies, the toy kitchen and pretend housework, whereas Nicholas loves lego, football and trains.
I don't really know why this is so; they're too young for peer-pressure to be an issue. Either we are unconsciously treating them differently or perhaps the kids have gone into mummy/daddy role-model mode. Maybe these things are to a degree pre-programmed.
[edit - speling (which is another thing women are better at!!)]