https://arstechnica.com/gadgets/2017/10/is-the-iphone-x-outselling-the-iphone-8-its-more-complicated-than-that/

The iPhone 8 saw Apple's weakest new phone sales in years, while iPhone X demand outstripped supply within minutes of the start of pre-orders last night. It would be easy to conclude that an underwhelming iPhone 8 has been ignored by consumers in favor of a much more exciting iPhone X, but it's actually not that simple.

Apple's online store now shows new pre-orders of all iPhone X SKUs shipping in 5-6 weeks in the US—more than a month after launch day. Generally, iPhone 8 pre-order shipments didn't get backed up that far. Apple also said consumer demand for the X was "off the charts" in a statement after launch day units sold out within 10 minutes.