With the iPhone 5s and iPhone 5c having now officially launched in nearly all of Apple's first-wave locations, Apple has issued a brief statement citing "incredible" demand for the new devices and acknowledging shortages of iPhone 5s models, reports AllThingsD.“Demand for the new iPhones has been incredible and we are currently sold out or have limited supply of certain iPhone 5s models in some stores,” an Apple representative told AllThingsD. Shipping estimates for online orders of the iPhone 5s opened at 7-10 business days in many countries, and while the device launched with 1-3 business day shipping in the United States, estimates