After you e-submit your app, PTCAS does grade calculations which they say can take 4-6 weeks. Mine was done in like a week. I e-submitted on 8/24 (after I new my PTCAS GPA) and my app was mailed to Northwestern and UIC on 9/2. The only thing that might hold things up is knowing that 10/1 is a popular deadline for some programs and that can slow processing times. If you really want to make sure you get reviewed by NU and UIC, I'd finish that essay tomorrow and e-submit. However, if you don't have a decent essay it's really your call whether you want to take the risk. Honestly, I think you have solid stats to the point where your essay might not matter a whole lot and you'll get several offers. FIY, you can designate other programs later after you e-submit. Additionally, out of the 6 programs I applied to, 3 were rolling admission and only one got back to me with a rejection, one said notification by October, and Midwestern DG didn't say anything. I also applied to 3 non-rolling (NU, UIC, and UKentucky), both NU and UIC said mid/late December and Kentucky said they'd send interview invites by February. Hope that helps.