I don't think being a female is a big issue to voters in 2016.
Australia and England have both had previous female Prime Ministers.
I have not felt it was an issue, not once.
Julia Gillard was not only a fantastic Prime Minister of Australia, but she was subjected to ridiculous treatment both by the Murdoch press and the petulant weasel she faced in Tony Abbott. 'Ditch the witch', etc.
Margaret Thatcher also has a substantial legacy by virtue of the fact that her policies largely have discredited her ideology. She and Ronald Reagan have their lovechild in the current Australian PM, and hopefully he trickles down all the way to the sewer.