I’m using the CNN exits, defining the gender gap as the percentage of men who vote Republicans minus the percentage of women who do, and comparing the gap so defined to the previous midterm results.
In the national House vote, the gender gap was 10; it was 6 in 2010 and 4 in 2006.
In the Colorado Senate race (Cory Gardner vs. Mark Udall), it was 12 points, compared to 15 in the 2010 Senate race (Ken Buck vs. Michael Bennet).
In the Iowa Senate race (Joni Ernst vs. Bruce Braley), it was 9 points, compared to 4 in the uncompetitive 2010 Senate race (Grassley vs. who remembers?).
In the North Carolina Senate race (Thom Tillis vs. Kay Hagan), it was 14 points. There was no exit polling in the 2010 Senate race, but in 2008 (Elizabeth Dole vs. Hagan) it was 9 points.
In the New Hampshire Senate race (Scott Brown vs. Jeanne Shaheen), it was 15 points, compared to 10 points in the 2010 race (Ayotte vs. Hodes).
Although there are exceptions, the divergence between the sexes in voting patterns seems to be growing.