BIGDENNIS10UK
All Star
some of what you saying is true but it doesn't have anything to do with race or western countries but with economics. in a lot of european countries, ex Italy, it's very common for kids to live with their parents into their 30's cause housing is so expensive and employment prospects for young people are dim. in america, england, germany, etc on the other hand housing is cheap and it's easier for young people to find work so they move out much sooner.
Dunno about everywhere, but it's more common for people to stay at home longer in london these days because housing deposits are so expensive .