The money quote:
The problem with Egalia and gender-neutral toy catalogs is that boys and girls, on average, do not have identical interests, propensities, or needs. Twenty years ago, Hasbro, a major American toy manufacturing company, tested a playhouse it hoped to market to both boys and girls. It soon emerged that girls and boys did not interact with the structure in the same way. The girls dressed the dolls, kissed them, and played house. The boys catapulted the toy baby carriage from the roof. A Hasbro manager came up with a novel explanation: "Boys and girls are different."