We just came upon this in a blog called Education Watch International:

There were two brothers from a famous family. One did very well at school while the other was a duffer. Which one went on the be acclaimed as the "Greatest Briton"? It was the duffer: Winston Churchill.

Another true modern parable: I have twin stepdaughters who are both attractive and exceptionally good-natured young women. I adore both of them. One got a university degree and the other was an abject failure at high school. One now works as a routine government clerk and is rather struggling financially. The other is extraordinarily highly paid and has an impressive property portfolio. Guess which one went to university? It was the former.

Quite sobering in our opinion.