You've pretty much nailed it.
I kept waiting for Gladwell to pull everything together into at least one rational explanation. It never happened. The book ended abruptly.
I probably didn't get into it because I could not identify with Connectors, Mavens, or Salesmen.
Tami probably did because she's obviously a Connector.
I did enjoy the stories though. I never knew about the role William Dawes attempted to play in the American Revolution!