Of course, its hard to tell how much of the stock out is related to high demand vs. low supply. We suspect stocks may have been low as others have noted that countries outside the U.S. listed "2 week" delivery times from the first moment the white iPad minis went on sale.
As typical, Apple will also offer the iPad mini in retail stores on launch day. Apple keeps a sizable stock of devices to be available on the official launch day of products. The Wi-Fi iPad mini will be available in retail stores starting on November 2nd. Meanwhile, the cellular version is promised by mid-November.
Article Link: Apple Already Sold Out of Initial White iPad Mini Pre-Order Stock