I talked about this hunch once before. I have to imagine that the estimated delivery dates are posted based on a computer algorithm. The input would be production, orders, maybe parts on hand and who knows whatever else.
Most of the data would be used for reordering, estimating production time production costs, available transport resources, . . .
If true the issue would be there is no new data for the refreshed models. Last hunch is that occasionally a run is made, that’s combined with old data and out comes garbage estimates.
Again, this is a hunch.