Well, my daughter:
So just make sure the Fembots have knees so they can sit down with each other for a nice chat
Jokes aside, I've often used Transformers to try and show my son there is nothing wrong with, as he terms it, 'girl stuff'. Like he has an eversion to the colour pink so I will dig out my Seacons and say 'Well these are pink and they combine into a giant killing machine!'. I quite liked Strongarm in RID as she really got away from the Fembot stereotype, both with her attitude and her alt-mode. I was really pleased when my son complained the other day the only Strongarm he has is the Happy Meals one.
We really tried not to steer our kids towards gender-specific toys and when they were little made sure the majority of their toys didn't make them conform to the stereotypes. But it soon became apparent when they started daycare at around 18 months that those were the toys they wanted. There were tons of different toys on offer but my son never showed interest in the dolls, he liked the trucks. Conversely my daughter made straight for the dollies and wasn't interested in playing cars.
We are really liking the Marble Run set we gave my son for Xmas as they both play with it and both really enjoy it. It's got a ton of different colours so there are as many pink connectors as blue and it encourages creativity and understanding of the basic principles of cause and effect. It's a brilliant example of a fun non-gender specific toy.
As for how the Japanese treat Fembots, I think they make the best toys by far, but they still market those Fembots to males rather than girls. For instance I love my Megatronia but the comic that came with her showed the rest of the female team soaping Megaempress up in the showerDefinitely aimed at male collectors.
Likewise Legends Blackarachnia is a great toy, but considering how busty they made her on the boxart, it made it apparent that it was a Fembot once again marketed to males.
How you would market Fembots specifically to girls I don't know, the most I have bought my daughter so far was the My Little Kitty/Transformers crossover toy an I intend to get her some Bot-Bots this Xmas.