The iPhone X is already outselling the iPhone 8 Plus in some markets, according to IHS Markit. And the 8 Plus is the first to sell more than the non-Plus model. Anyway, its looking like a good year for Apple, despite the delayed launch of the X (the 8 duo launched over a month earlier).
In eight countries typically high GDP markets the iPhone X already makes up over 2% of all iPhones (including the old models).
In the US, iPhone X adoption after three weeks matched the adoption of iPhone 8 Plus and beat early adoption levels for both the iPhone 8 and 7 Plus. Only the iPhone 7 model had greater initial success. In Japan, initial iPhone X adoption was as good as or better than any recent iPhone launch, and matched the level of the iPhone 7.
IHS notes a strong correlation between iPhone Plus sales and X sales basically people want a larger screen and a dual camera and, more importantly, can afford the price.
Speaking of, IHS forcecasts that Apple will ship 88.8 million iPhones in the last three months of this year, the best quarter ever. If 31 million of those are iPhone X units then the Average Selling Price will break another record it will go over $700 for the first time ever.