I subscribe to the "Hire the best person for the position" methodology.
I manage a SysAdmin team and I will admit that 100% of my team is male but that might have something to do with the fact that 100% of the job applications I have received over the years have only been male. Other than that, 70% of my team is made up of what many of these PC groups like to call 'minorities'. My percentage comes from the simple fact that they were the best person for the job. Race, gender etc should not be part of the selection criteria and if it is, it only increases the chance it will hurt the company/organisation since you are passing by the right employee for a philosophy that dare I suggest is a form of discrimination in and of itself.