"On average, women tend to be more motivated and more invested in good parenting than men, but plenty of men are at least as good if not better than lots of women," Stacey told Discovery News.
"It's like saying that men are taller than women," she added. "These are average differences, but they don't divide the two groups."
Regardless of gender, Hilton and Stacey both note that parental resource availability and investment is a key predictor of positive child development.
In fact, Stacey expects that as more research emerges on childhood outcomes of gay-parented families, gay men may turn out as the best parents because of the deep commitment required for them to legally father children.
"So it isn't about being gay or being male or being female," Stacey said. "It's about how important this (child rearing) is, how big a part of your life it is and how much you want to give to it."
Cristen Conger is a writer for HowStuffWorks.com.