My assumption is that if you have any talent at all, you'll inevitably be a hit in the place you were born first before moving on if you desire more fame/money. There is a top tier of British Comedians/Actors who did this (and they often come back and do things in both places). If you are only a hit after moving on, it's because you fell just short of entertaining people and being foreign is now pushing you over the line. That guy isn't impressive to me at all (he isn't Scottish by the way Chanur if that is what you meant).