As a father of an 8 years old, this is very moving.
While Terence is -without a doubt- born with prodigious abilities, I think credit should also be given to his parents Billy and Grace who seem to have managed to simultaneously nurture these special abilities while still letting Terence have a happy (?) childhood. This is not easy to do.
In my house we discuss a macro feature of children as being "school-shaped". If Terence Tao wasn't school-shaped, would he have been as successful? The counter-point to that is to ponder how many children fail to achieve a similar level of success because they don't fit into the school system so are left by the wayside.
Can't find the reference but from an interview with his parents there apparently there wasn't much "nurturing" other than simply making available the necessary materials which he gobbled up. Its not like they put a made him practice for an hour a day.
A boy in my high school class made IMO and got a gold medal (and later on won the Putnam one year). They interviewed his parents and it was a similar story.