Looking at this morning's announcement of Animal Crossing having an early November release in Japan, I went and checked the dates for past AC releases and how long other territories had to wait. Surprisingly, they all have pretty much launched within a week of each other.
It may be wishful thinking on my part, but I'm expecting (hoping) that history repeats this time. Granted early November is already planned around the Wii U and the 3DS Paper Mario, but it doesn't seem too farfetched to think AC might hit the streets before Thanksgiving. Nintendo seems to favor releasing the series across all regions at once.
I guess we'll find out Sept. 13th.