I can definitely confirm this from my time in college at least. I had an 8am, 4 day a week calculus class my first semester that I was only taking to get an eas

I can definitely confirm this from my time in college at least. I had an 8am, 4 day a week calculus class my first semester that I was only taking to get an easy A since I already had the AP credit. Ended up dropping it and my grades in every other class improved. My best semester by far was one in which I somehow managed to schedule all of my classes after 2pm until about 9pm.