You know, because I'm a masochist, I went and read
the actual study from the article in question. They explicitly say they are using a Jan. 15 start date, which is about the time of the first recorded infection.
So there you go, confirmation from thethe's own source that his "LITERALLY IMPOSSIBLE THAT IT WASN'T OCTOBER, NO MODEL CAN DO THOSE NUMBERS" position is wrong. These guys are modeling waaaay more infections than anyone else, but still managing to start their timeline in January.
I fully expect thethe will graciously ponder the implications.
The study in question actually provides an interesting scenario of hyper-contagion to try and show a "safer" path that gets us to the same place. Not sure they really have good enough data to be actually convincing, but it's a good attempt to show a plausible "everybody has it" path.