It doesn't make sense that a 4.0 wan and a 4.0 women could be anything other than equal. For the system to make sense a 4.5 women should beat a 4.0 man. I think it is commonly believed that even the top ranked women in the world would have a hard time hanging with a "pedestrian" 100 to 75 ranked man. To me it makes more sense to assume there are no 7.0 female players in the world than to skew ratings.
I'm not sure if that makes sense.
fearing a wack planet since 1988