Ya know, I hat to gloat but this article and research just seems so "duh" why did it take so long?!!
Yes, not having to work around ingrained patterns and stereotypical expectations certainly 'lightens' the load with child-care, housework, dinners, goodness knows what else.
My experience is that the relationship is much more cooperative and 'sharing' with two women.
Of course, never having actually been in a child-rearing relationship with a man, I don't know what the other side is like.
Nichole