Why does everyone worry if women can be tough enough?
When you're sitting in a comfortable office, perfectly secure, with people waiting on you hand and foot, and you control the strongest economy and army in the world, not to mention the bulk of the nuclear weapons, ANY wuss can be a bad-ass.
A better question to ask might be "Is a woman going to feel compelled she has to prove she's as tough as a man?" Starting a fight you're convinced you can win doesn't require courage.