Heather, thanks for bringing up that important difference between "small" and "big." Being a part of a smaller group or organization of any type does increase both your sense of ownership and responsibility. Even people who live in smaller towns vs. large cities can feel more responsibility AND feel more empowered to actually put their skills to use and have an impact.  Maybe that's why it's important to create a sense of identity as neighborhoods, within larger cities, and small groups within mega churches.