My ex-wife was a multi-tasker extraordinaire. I see no clear cut difference of women or men being better at it. My wife was better than me at it, but a couple of my friends off the top of my head can shame their wives into looking bad bad how good they can multi-task. It's just what you're used to I suppose. Though my wife was a better multi tasker, I was clearly more intelligent and specialized. So who wins? No one. She was a fantastic help meet, and what she could not do, I did so it was a good pairing.
Don't all mothers have to be good multi-taskers? One would think so.