Exactly. If you were to make a stereotypically "masculine" presentation, you wouldn't get negative comments on it.
EDIT: I must go to the wrong programming conferences, never see suits. Wish the down voters would just share their experiences!
I also do not penalize for dress during interviews either. It's a distraction from the important things, and irrelevant to the answers to the questions of coding ability and culture fit.
Aside: Atlassian is more interesting. H/P has better food.