Note quite. You can do that for schools that screen GPA/MCAT. However there's a good number of schools (e.g.: Stanford, Tulane, Harvard, Johns Hopkins, etc) that give automatic secondaries once your AMCAS app is complete. I think Tulane just points you to some online link to download the secondary.
Since these schools are on rolling admissions, then the sooner you get a secondary in, the better chance to get a spot. Assuming your MCAT is done, and other materials get to AMCAS on time, verification is pretty fast.