Here's my math on this:
All voters expected to be -
Male voters 53.5% to Women voters 46.5%
The Kerry Gender Advanrage -
Women for Kerry 53.5% to Bush 46.5% (this is half the gap
Gore enjoyed in 2000)
So the above wash out and we would expect exit polls to show 0% gap if they polled an equal number of women and men.
Therefore the expected gap should be 18% for Kerry if 59% of group is women (59-41). So an actual gap of 4% is rather good for Bush.
Sounds goods to me