This is all over the place haha.
Unless we get a huge sample size and could build a prediction model with parameters like destination, color, wheel size, and OD, I don't think we will see a trend here. Things might even be harder to predict since we don't know how their factories work (for example: do they rotate models every day? or is it based on the paint?) and how deliveries are planned (for instance... schedule of trains from the factories to delivery centers? I'd assume this is planned weeks in advance.)
I'm really impatient too but it feels like a delivery date will pop up someday and I have no way to predict when.