Alternatively: "students who wait to the last-minute to register for their classes get stuck with the 8AM classes and perform worse than students who registered early."
Oftentimes scheduling windows open up by class and honors rank. So honors seniors get first, then seniors, then honors juniors, and so on. Freshman schedule at the end, and for first semester freshman on summer orientation, you are scheduling a good 3 months after the last sophomores scheduled their fall classes. Maybe your orientation is late in the summer, now you schedule behind all the other freshman.