5000 is a lot, but believable. Hasay claims she runs 100+ mpw, and if my understanding of the NOP program is correct, a relatively large proportion of this is quality, and there is a lot of ancillary strength work. So, the "Dean's list bio major" (presumably at Uncle Jim's Bible College?) using the 100cal rule isn't valid - it matters how efficient the runner is and what effort they are putting forth (amongst a host of other factors that we can't know). If Hasay is doing her easy runs rather quickly (as I understand Salazar tends to instruct) and is doing a lot of quality sessions, her 100mpw is likely metabolically more costly than one might typically assume. Throw in a lot of weights/plyo/core work and things add up fast.
As an example, I am female and run 80 mpw. I eat ~3500-4000 depending on the day. Granted, I am much taller than Hasay at 5'9", but I also do next to 0 physical activity outside of those 80 mpw, and do substantially less quality work than she does.
A lot of people with weird/disordered attitudes about food (exemplified by many responders on this thread) fail to grasp that metabolism of an athlete is much more complicated than calories in and calories out. The calories you put in dictate how much you are able to put out to some extent, so it is possible to eat more and not gain weight despite no apparent change in physical regimen. You might find you perform a bit better or more consistently.
[I was also on the Dean's List, but not in biology ;) ]