I am not sure what your carry setup is, but I bet a "real" cyclist with racks and grocery-getter panniers could blow most other guys out of the water during super busy times like finals by just being able to efficiently carry and organize a bunch of bags. Got 10 bags going to the same location? No problem. Not that the other guys aren't in shape or fast, but in my experience, most are young and vain about looking cool on the bike. My old coworkers didn't want to mess up the look of their bikes with racks and things (I didn't either, if I am honest). Digging around in your giant messenger bag is just inefficient and smashes the bags. I used a structured soccer backpack that kept the bags in better shape, but a rack would have been so much smarter.