UChicago students order coffee everywhere, including, like, Giordanos or the UChicago Bookstore. I’ve tried to count every coffee shop in Hyde Park and lost count in the 20s. On campus the farthest you have to travel to a coffee shop is literally half a block. And that’s just shops that exclusively sell coffee! You can get it at many more places. People are upset over the closing of Classics Cafe despite the existence, in the same quad of Cobb Cafe, Harper Cafe, and Grounds of Being.
So this is completely believable. From what I’ve seen at other schools I think we have a reasonable claim to be most caffeinated.