Sure, but a population of 'all women' is different than the comment you are replying to, which was specifically addressing female executives. Here's the data for that, which supports their conclusion - over 50% have their first child in their 30s.
http://www.pewresearch.org/fact-tank/2015/01/15/for-most-hig...
That definitely supports their assertion, thank you.
I didn't mean to up vote, sorry; less than 25% of women are CEOs, and there's no indication of overlap between these two groups.