I think my favorite quote from the article is the last paragraph:
Many women with demanding careers tell me that it is women working full-time in the market, not women overall, who work more than comparable men. This study cannot settle that question because it does not report work time separately for people with and without market jobs. But if women with careers work more than men, while women overall work the same amount as men, then women without market jobs must work less than men. Men can use that argument to hit the couch in the afternoon. Or to end up there at night.