Statistically, hiring minorities who are being underpaid is the most cost effective decision. If market pay for job X is $M, and a woman makes 11% less, therefore, hiring women at $M will result in 11% higher quality.

Ideally, I'd fill a team with women and other underpaid minorities. Add in some old people and you've got a hell of a team.

Plus with a team of minorities, it's easy to get underestimated by the competition. "Oh look that team is full of old ladies who code in PHP!"