I only watched half way through, but yes, it is what good sportmanship is still today. However there are a lot of bad sports around, and if they are elite sports people often that lets them get away with it.
As far as children go, I think sportsmanship has changed, if fact it has probably improved. I can remember back 20+ years ago where it was common for parents or families of the children playing would be yelling all sorts of horrible things to the opposition. It is very frowned upon today, I think.