Georgetown has the School of Foreign Service, which has tougher admissions standards than the other 3 Georgetown undergraduate schools, and is the #2 ranked undergraduate program in blah blah blah but seriously the number of people who turned down Harvard for Georgetown SFS was very small, whereas the number of people in the SFS with a big chip on their shoulder because they didn't get into Harvard was very large. (I, personally, did not get turned down by Harvard because I had zero chance of getting in and so did not waste any money on filing an application and was happy to even get admitted to Georgetown.)

CMU has 7000 undergrads, of whom 600 are in the School of Computer Science. So, if you take a random CMU student who decided to start a company and looked for VC funding, you've got a <10% chance of an SCS alum and a 90% chance of a non-SCS student (assuming likelihood of starting companies is uniform, which who knows if it is but I have no reason to assume otherwise). Whereas at Stanford 100% of students had to get into Stanford.