My husband and I are on a very similar timeframe to you. Will be interesting to see the timing we all get processed. We also submitted everything upfront and received the generated email around the same time. As we had used up our 60 doc limit, we supplied a few documents via email after we got that auto email.
Welcome aboard, hope you don't have to wait much longer (by my calculations from previous 309s documented on here, they seem to be approving around the 9/10 month mark) :-D