Delivery times for the just-unveiled iPhone 15 Pro quickly slipped until November for some configurations, suggesting that demand is strong for the high-end versions of Apple Inc.'s new lineup.Four iPhone 15 models became available for preorder on Friday in more than 40 countries, following their introduction at an event Tuesday. The high-end Pro Max model, which starts at $1,199, quickly saw its promised delivery slip from Sept. 22 to as late as mid-November in the US. Shipment times for the blue and black iPhone Pro Max models slipped...