http://news.bbc.co.uk/1/hi/world/americas/7843154.stm
According to this research, fewer British men survived than would be expected.
This is explained by the British ethic of orderly queing,and of letting women and children go first.
Americans were said to have a more individualistic (selfish?) attitude.
I would add more, but I don't want to be pushy.
After you old chap.