That wouldn't make SnR's comment "completely wrong" though, would it?
Typically, off year elections get ~40% voter turnout, which is significantly higher than 24%. Elderly voters typically have ~60% turnout rate in off year elections and ~20MM voters. That is, even with 20 year highs in off-year turnout for under 30 voters, voters in general turn out in higher propotion than under 30's and elderly voters turn out in significantly higher #'s and %ages than young voters.