How do you know that, of the Caltech applicants, there weren't just more qualified women than men? Women are outperforming men in education across the board.
While I could accept that the bottom 16 of males and bottom 0 of females are joke applications, these each included a substantial application fee ($75).
It wouldn't be the slightest bit shocking if, on average, men were somewhat more overconfident than women on their ability to get admitted and to the work at an elite technical school.
Of course, that doesn't mean the school doesn't also have their thumb on the scales to adjust demographics in various ways.