These kinds of 'studies' need to be taken with a grain of salt. If the researchers are relying on people to provide them with the amount of time spent doing things, it may or may not be accurate. If they are actually studying the daily activities of participants, they are likely not behaving 'normally', because they are being watched closely.
My take away is that even with supposedly more help, women still are spending the same amount of time on 'work' in the home.
Why? Would be my question.
People buying bigger houses, therefore more work?
People really not into the 'less is more' mantra they want us to believe everyone young is living by. In fact do they have more stuff, and it takes more time to deal with it?
Could it be that even with men doing more which should create more 'free' time for women, it does give them more time, but they just use that time to do more household/child centered things, because they either want to, or because they weren't getting it all done in the past with the less help anyway?