https://techcrunch.com/2018/09/24/iphone-xs-max-is-reportedly-dramatically-outselling-the-xs/

According to some early numbers from Apple analyst extraordinaire, Ming-Chi Kuo, the iPhone Max XS is currently running laps around its smaller counterpart. In a note posted by MacRumors, Kuo suggested that the 6.5-inch handset sold three to four time as well as the XS during its inaugural weekend.

“We have determined that the demand for XS Max is better than expected (3–4 times that of XS),” says Kuo. “The gold and space-grey colors are significantly more popular than the silver. 256GB is the most popular, and 512GB is subject to a serious shortage because only Samsung can currently ship NAND Flash well. We are positive that XS Max shipments will grow steadily in 4Q18 thanks to demand from Asia market and the gift season.”