Korean Solo Q vs. NA Solo Q
This may be controversial to NA solo queue culture.
I find that NA solo queues never(like never in my point of view) surrender a game, no matter what. Even if there is trolls in team and end up having 3 mid players or 2 adcs; the game goes on until 20 + mins.
Generally when this happen, Koreans just abandon the troller and let the opposing team push mid, end the game at less than 10 minutes so they can actually 'enjoy' the game. Not to mention every single player reports the person, post the troll's name on community website so the troll cannot play the game with greetings from fellow summoners.
For me, after playing Korean solo queue, the NA queues are dragging an obviously trolled and ruined game out and embrace the suffering that is coming out as outcome.
It may seem silly to some of your point of view, but it seems to me that Koreans are actually trying to play to win, and let go of the inevitable loss as quick as possible. But, as conclusion, they do create the world's best league of legends players which is proven at the All-Star match last weekend. I cant say "This is THE reason for Koreans success", but I think NA should learn to give up the game at the right time so the culture of win establishes.