Ceteris paribus: without Blender or a mop, and without knowing anything about new hires, the assumption is that the new girl is a designer.
It's prejudice precisely because you don't have any other information.
Is it really a negative stereotype that women and men are equally capable but that a woman is more likely to be interested in an equally respectable artistic career over a technical one?
It seems that people on HN hold this developer superiority belief so strongly that if someone asks "are you a designer?" they think that is actually an offensive statement. How dare you think I am a plebe designer and not a developer god that I am?
I don't mean criticizing anyone in particular in this thread, I just suddenly realize that this has often been the case in my personal behavior and in that of people around me.