To sputnik and those of us in a similar boat:
In another life I interviewed for med school. I told one interviewer about how I felt constantly intimidated during the process because, upon visiting any given school, I inevitably learned that 90% of the other folk invited to interview that day were from undergraduate institutions more reputable than mine (often significantly so!). The interviewer responded that he had felt the same way while he was interviewing, in fact he had felt intimidated even after being accepted. During a party for newly matriculated students, he was standing at a urinal next to an Ivy League peer who was lecturing about the virtues of his undergraduate education. While he was pissing on his shoes. Problem solved.