As someone on both sides of the equation, I feel justified in saying that it's not continents but nations.
Caerwyn hemmorages new nobles, because sure you get some greetings but it seems like new players are being used in a faction or schemed for or manipulated. Arcachon doesn't seem to have that problem at all. I think it's a very small sample size but people dislike feeling used. One of the selling points of the game is that you're part of a team from the start and I think it makes a big difference to new players as to if they are pawns in someone's scheme or if they are being brought into a club that has your back if something goes wrong.
Again small sample size, but that's just what I've noticed.
