After knowing from almost the start that if new arrivals could not make a decide a coin would be tossed to decide who gets a new arrival it has finally come into play.

I was starting to think that was just a line they used in shipwrecked.

what i want to know is if the all new arrivals new about that option if there was a stalemate, and if they did would they of stuck to their grounds more - giving us more coin tosses.
(either that or was it purely introduced when brie and jon were at stalemate and the producers had to find a way to make them decide & then the producers pretened it was there all along)

to be honnest it would be boring if it was every time used everytime, but better if it was used to make roughly 1/3 desicions - as this could mean some of the choices are out of everybodies hands and however much promices are made of guarenteed survival they might be in vain. of course sometimes new arrivals we happy to chose the same island - which means that there were times when the coin was not needed, also sometimes people were easily won over into changing islands (even though they risked not being chosen).