Chill guys, don't withdraw your application! I was complete right at the beginning of August and I did not receive a complete e-mail until a few days ago. They probably have a complicated subcommittee system divided by region and/or scores that takes time to process application completions, which does not strictly correlate with completion dates. After all, this process has to be overwhelming on their part; most of the adcom members are not paid to be on adcoms and are physicians or scientists with loads of work outside of their admissions service.