Marriage calculator figures divorce odds

Divorce360.com and Betsey Stevenson of the University of Pennsylvania’s Wharton School has come up with this new method of figuring out how likely you are to get divorced.
Stevenson is credited with saying, that the “divorce rate has been falling in the United States since 1979 and can vary widely according to demographics.”
So, depending on variables such as your socio-economic group, education, where you went to school, friends, race, religion, etc, the partners are suggesting your likelihood for divorce could be affected.
What do you think? Is this a bunch of hog wash? Or could there be some truth to this? Check out the article here