Hey
I'm a Canadian applicant from the 08 cycle and I took my american DAT during the last week of sept (I didn't know the application cycle in the US opens so early). Here's what happened to me.
Wrote the DAT late Sept, Submitted everything by mid-to late Oct. AADSAS recieved and processed everything by the 3rd week of Nov, and the schools received my full application around Dec 11th. Then, I had to waste more time as they sent me letters asking for my application fee for each individual school. So I didn't have my first interview until Feb.
I think if you're competitive enough (solid DAT scores and GPA ~3.7+ [I had a 3.8] ) you should be fine. But, I should mention that some of the schools I applied to already filled up their classes, and the schools I did interview at had most of their seats filled already. So just blaze the interview when you get them and hope for the best...!
(This is just what I know from my experiance...=P)