I know that most of my applications were not completed until the very end of August but my AMCAS was processed in the middle of June. I think my first one was completed the 25th. I received my first interview notification the 10th of September and have received two more since then. I do caution you though because it seems from my own brief experience (and having had many friends aopply last year) it is completely random! Some schools give out interviews before applications are even completed (ie Pitt and Vanderbilt) while others hold onto completed applications for what seems like forever for me but then again there are others who receive interviews off the bat. Although I admit to knowing nothing, I still check my email every 10 minutes, yet, I hope this is merely a fleeting obsession and will pass soon. 🙂
My advice is to get everything finished asap, while still doing a bang up job. Also just like people said when we were studying for the MCATs, stay relaxed and try not to worry too much and hopefully everything will work out for the best!
-CT