Submitting your application early or on-time is one of the most important things that you as an applicant can do you make your position stronger (and to save yourself from insanity). I would say applying any time from June 1st through the end of July is optimal, the end of August through September is acceptable. That is not to say that people who apply afterwards are not players, but I think it saves you a lot of heartache personally.
I believe submitting at the end of August through September is probably the latest that you should apply if you are expecting to hear from school December 1st. Why? Because this is when I applied, and I nearly went crazy trying to contact AADSAS to see if my application had been processed. Processing takes 6-8 weeks (but longer if you have to make corrections). In addition, the application service did not send out my recommendations/transcripts out at the same time as the rest of the application so I would receive notifications that my application was not complete.
I received notification that my application was complete at several schools towards the end of October and beginning of November. I believe this is a solid position to be in -- ad coms can take up to 2 months to review files even after they are complete. If your file looks good, then you will probably be invited to interview before December 1st, which is crucial if you are looking to be accepted in the first round.
Most of my information comes from personal experience -- when I asked other people about applying at the end of August (too lazy to finish my personal statement before then), I was told that I was behind. That really got me moving, but I think that was inaccurate. My college counselor told me that I was right on track, and I interviewed at 4 schools before Dec 1st, and 4 schools after (last one being at the beginning of Jan). If I could re-do the process again, I would have tried really hard to finish everything by the end of July. Sure, the ad coms probably don't meet until the end of Sept, but allowing for your application to be processed as well as time for any corrections which need to be made, plus time to fill out secondaries, I think it's wiser to be early than late.
When you submit your appication is one of the last portions of your pre-dental track that you have any control over. After that, it's going to interviews and then waiting for the acceptances to roll in. Although it may have worked for some people to apply late, I don't believe that this is true for the majority. Why risk it? Yeah, it's a pain to apply, but you can still submit the application without your most recent DAT scores (or DAT scores at all) and then have the DAT scores sent directly to the schools themselves after you take them. The most difficult part of the application is just doing the personal statement -- so all of you that have free time out there, start brainstorming ideas! :wink:
ricegirl