Geez, people are all jumpy at the moment!
Instead of jumping at the fact that dejavu is being all sexist, perhaps he (or she) is being honest. From what I can tell, unless there are a few females that go by one of those interchangeable names (such as Chris) then there is max of one female on the QF A330. Even then the name is potentially a bloke's name- or at least I have heard blokes names like that.
So how about taking the comment at face value rather than putting your own confirmation bias of sexism into the equation.