It doesn't matter at all, they're only model trains when alls said and done!
But the BR(ec) was announced as initially arriving in mid-November, with the others spread over the next week or so and as each date arrived we had the game of Hornby Hopscotch as a new date was announced. A retailer was even told on the 29th that they were "in stock and ready for dispatch". It later turned out that they had been misinformed. Not the fault of the retailer, I might add.
The same thing is happening with the other eagerly awaited loco, the Peckett W4, which has delivery dates now stretching into January, although only the most sanguine would have believed that the H&P Peckett would be delivered on Christmas Eve!
So we're all waiting with varying degrees of (im)patience!