[fouc]

I think there could be a couple of confounding factors here:

1) What demographics are these older parents in? Are they basically baby boomers or Gen X having kids late? Milennials are approaching 40 years old, so they could potentially be more chill as first time parents perhaps or not.

2) If both parents are old, then I could see the mother potentially feeling overprotective, feeling like all her eggs are in one basket so to speak. I'd kind of think that an older father would probably be more chill.

In 2006 I worked with a software developer that was 50 years old and was equally new to Ruby on Rails and also had his first baby on the way. He was chill and young at heart.