re: Does defense still win championships?

Yes. Everybody (except LSU) has an offense capable of scoring plenty of points. Defense makes the difference though. Who has a defense that is going to create turnovers or get the stops in big spots? Ohio St created turnovers and Alabama on three straight drives in the 4th quarter that started around midfield in the Sugar Bowl. Ohio St shutdown Oregon's high powered offense as well. It's no mistake that Alabama plays defense better than anybody (in general) and has won half of the last six titles. Auburn won a defensive struggle with Oregon.