In my case it was also increased. The delivery date was initially 01.10 and this morning it was moved to 12.11...

I also ordered the phone on the first day. Delivery was first set for the beginning of October, then it was adjusted to tomorrow. Then this morning it was changed to 15.10. and just now to 12.11. It is partially available from other providers. It's a shame...

From what I've seen, the situation is no better with other sellers. Apple itself also gives the delivery time as the end of October and there will probably still be pre-order customers on it.