@murenj, agree with your challenge on single mothers. But definitely not as it relates to Esther - broad strokes, wrong coat, painter without a clue!!!
That is a family of high achievers and professionals, very well brought up kids by both mother and father. Easy to talk about things when they're distant and remote - not personal and close and relating to oneself.
Now about single mothers, not very different from both parents. The mates people choose can always be linked to upbringing / parent's personality in both cases.
I'd assume children brought up by single parent would generally be more responsible due to challenge. But hats off go to single mothers, they do a fab job!!!