OP, thanks so much for this thread. I guess we can just chalk it up to your and your wife's application being in the right place at the right time. We'll probably never know why your processing was so amazingly quick, but thank you for empathizing with the rest of us.
Sander, thanks so much for your thoughts, too. Your explanation makes sense.
On Sunday I received VisaJourney's weekly timeframe estimate and it did say, "Any day now" which was thrilling given the last estimate of November, if I'm remembering correctly. Hopefully this turns out to be true for we August filers still waiting on the edge of our seats.