So you don't think the Giants were lucky that Madison Bumgardener decided to have the best month of his life? They were just clutch? If the Giants and Royals were so clutch why didn't they have more wins in the regular season? Again, anything can happen in a short series. The best teams generally don't win the world series. That's the nature of the playoffs. You can win 87 games and ride 1 pitcher to the title.
You don't subscribe to the idea that teams could take a few months to get into their groove.
An individual team can look different at the end of the season than they do at the beginning. Thats why I think just looking at average performance is not really indicative of the best team by the end of the season.