I do feel that in the last election a lot of youths thought there was a lot at stake. When they feel there's a lot at stake, they come out in bigger numbers. I'm not sure if that necessarily indicates a trend, so I'm not sure how to answer that question.
My thinking behind the age of 16 as the voting age is that we're talking to youth. They take a civics course in grade 10, and it can be bit meaningless when they can't put that into practice until after graduation. If they have a chance to vote while they're in high school, and they're engaged in their class, I think there's opportunity to increase the younger voter turnout.