@Thoroughbred_Med @mpre - I think
@BaseballMD17 is right on the money here. At all 3 of my interviews, I'd say at least 1/2 of the folks in my groups had graduated from their undergrad programs (some even from graduate programs) and were working full-time, myself included, obviously. Not everyone can send in new grades as an update, but what you've got to realize is that in some cases this might not be what's holding you back. If your grades are competitive, you've got to make the time to work in volunteering, shadowing, etc. onto your schedule. You don't need to completely bury yourself in a bunch of different charity outlets, but try to find time that can be used to participate in activities that are both personally rewarding and reflect an altruistic and motivated personality. Try preparing dinner at homeless shelters one night during the week, volunteering/helping with homework at after-school programs, or serving at a mercy-clinic early on Saturday or Sunday mornings - whatever you can do. If you're married with kids or are in a serious relationship, try and get them to volunteer with you. Working 40+/week is definitely draining, but sometimes you've got to pound the pavement to make your dreams come true!
I assume that how much stock is placed in these types of updates varies on the applicant, but
you have nothing to lose and so much to gain. At the very least, you've got something new to bring to the table if you need to re-apply for the next cycle!