I think Sprite is quite correct about team diversity. I seem to recall a number of studies carried out by the RAF and USAF back in the 80's and 90's in regards to reaction times due to audible oral warnings and orders issued by the voice of the opposite sex. In all instances the reaction time and decision making process was faster and more correct when the warning was issued by the opposite sex to the pilot. That led to a few changes within both organisations with the aircraft warning systems. At that time almost all air force pilots were male so a female voice was used - I believe a few of the women who lent their voices were Kim Crow and Sue Milne - both of whom gained something of a celebrity status. Their instructions saved lives, without doubt. Take from that what you will.