Actually it is a huge difference. Anything over 10% is considered a landslide.
You have to put these numbers into context. Women in general voted for Obama 55-44. They comprised 53% of all voters. White woman voted 56-42 for Romney, but they comprised only 38% of the electorate.
Black women voted for Obama 96-3; Latino women 76-23 for Obama; and all others (Asians, mixed races, etc.) 66-31 for Obama. Black women comprised 8% of the electorate; Latino women 6%, and other women 5%. Thus, minority women comprised 19% of the electorate compared to white women who were 38% of the electorate.
When we hear about the War on Women and the GOP's problem with women voters, it has to be placed into context. The GOP problem is primarily with minority women. They are winning the women's vote among white women handily. We are really entering an era of tribal politics. IMO the GOP should be concentrating on winning more of the white women's vote than all of these efforts on outreach to the minority community. White women make up 38% of the electorate--twice the percentage of minority women in the electorate.
White men voted for Romney 62-35 and they comprised 34% of the total electorate.
I thought the primary indicator of how white women voted was wheter or not they were married.