Hi,
Wow, that's good. Do you think your case was sped up because of an age out situation? For example, do you have any child who's on Green Card and going to turn 18 soon. There is always the odd case that goes faster, but I have always wondered if it was just a hiccup or because of an age out situation or other rational explanation.
In general, I think interview letters follow a bell curve, there are always a few cases that either take much less than usual or much more than usual. Most people are in the middle of the curve, which seems to be now around beginning of November PD.
There is not an age out situation in our case. My wife is 28 years old we have no kids. The only thing that I can think of was that my wifes green card was replaced fairly recently due to it being lost and maybe her file was out in the open and ready to go. Other than that I cannot think of any rational situation as to why our case was sped up but again... I won't question what we already have.