This is an example of what I'm talking about. According to data from "Monitoring the Future", teen boys have always been more right leaning than their female counterparts, but there's been a recent spike in them becoming more conservative, and at a more abrupt rate than teen girls shifting left. As a consequence, on net teenagers are more likely to self-identify conservative as of the most recent survey data.
I will concede this chart is a bit misleading because it excludes people who don't self-identify as either liberal or conservative, but you can still see the general point.
We have seen this sort of data before. The truth is that young men have recently STOPPED becoming more conservative, and young women are CONTINUING to become more liberal.