What it completely fails to do is tell us what percentage of young people registered. Nowadays you need to register individually, and I would have assumed that less young people registered than average, so that 65% of "something" could be exactly the same as the "36% of young people voted", depending on registration levels.
Does anyone have access to the raw data behind this? Because right now the figures seem meaningless.
Original post on Dreamwidth - there are comments there.