the research that Dobson cites is not his own. It was presented to Congress and is also presented by National Review. What the author did (cant remember the name) was look at marraige rates before and after acceptance of homosexual marraige/partnerships. He found that scandanavians usually got married after the first kid. Once homosexual unions became accepted, there is no pretense of getting married at all in these countries. I'll find the article and post the link.
Results of gay marriage in Scandinavia.
Results of gay marriage in Holland