I doubt it. They've shown questionable judgement merely by hiring Mayer, whose accomplishments at Google are not especially respected among those with inside knowledge, and whose priorities will shift wildly after she gives birth in October. The board will terminate her in 2013 after 7-8 lackluster months. Then they'll start shopping Yahoo to be broken up and sold as parts.
I wrote some of the best, most creative code of my life in the first 6 months after my son was born. I was focused, and yet could work on multiple project simultaneously very effectively.
I got hardly any sleep, so if that is "being a slave to my hormones" I'm all for it!
Either way, I think it is fair to say that the effects or parenthood are very unpredictable.
You'll need to offer studies establishing a causal relationship between testosterone levels and technical/business success for the difference to mean anything.
For all we know lower testosterone levels may lead to a heightened business acumen.
It obviously does not affect everyone in the same way, but as a generalization, I would say that becoming a parent clearly makes one a more responsible person.
Surely you're not suggesting that she will be less capable to head Yahoo after she becomes a mother? The first few weeks / months are difficult, but after she adjusts to the 'new normal' that is parenthood, she should be right on track.
