I think the answer to this has been no, females won't go into engineering more no matter how you culturally delegate personality attributes. Consider the sales of the toys and the admissions rates into engineering programs DESPITE the fact that more women are being admitted to university than men [1], and yet still engineering programs are 80-20 male-female[2], despite the gender neutrality motions taking place and the fact that it's no longer the 50s with openly sexist TV commercials and advertisements.
[1]: http://www.statcan.gc.ca/pub/89-503-x/2010001/article/11542-... [2]: http://theblueandwhite.ca/article/2011/03/09/19/47/52/someth...