I agree with in the sense that teams need to copy the C9 mentality. I don't think other teams can play C9's exact game (Zilean, Hecarim, Singed), but I do think they can copy the C9 strategy on how to beat really good teams on an international level.
The thought process for most of these teams is to copy the way the best teams in the world play... not understanding that isn't going to work, because the players in LPL and LCK are simply more talented than the NA players... so playing like them isn't logical.
If teams copied the C9 strategy and mentality when it come to bans (target ban. don't be afraid to let "op" picks go over to the other side, just ban the champions that the enemy team is the most comfortable with), picks (pocket picks. Play what you're best at. learn from something that has failed and don't go back to it... in fact... play something completely different. Who cares if it is "meta" or "strong"?), gameplay (which lane is winning or can be easily carried? Is there a lane that is guaranteed to lose? Stay away from it. Don't go there. Farm it out if you need to. Fight for the late game or fight for the team fight. Don't be afraid to be aggressive or go for a fight, even if it doesn't really work on paper.)
Cloud 9's adaptability is the reason we always see them make it through. They show up with a plan, but no that the plan needs to change depending on what is happening in the games they are playing.