Surveys conducted by analyst Gene Munster found that only 56% of core configuration were in stock as of last Friday, December 12th. He believes that availability will improve to 80% by the end of the quarter; however, expectations were that Apple would reach 100% in-stock before the end of December.
Notably, iPhone 6 and iPhone 6 Plus availability is actually slightly down from last month when Munster's survey of 80 Apple Stores found that 58% of models were in-stock on November 14th. In October, only 6% of models were in stock.
Piper Jaffray also found that supply of the iPhone 6 is more constrained than the iPhone 5s was last year.
Currently, online ship times for the new 16GB and 64GB iPhone 6 and iPhone 6 Plus models in any color from AT&T, Verizon, Sprint and T-Mobile ship in 3-5 business days.
More details in the chart below...