Shares of Apple fell nearly 3% as some analysts interpret shorter shipping times for the new iPhone 16 Pro models as weaker-than-expected demand.Early pre-order data shows that shipping times for iPhone 16 Pro models are shorter compared to last year's iPhone 15 Pro models.Improving supply of the Pro models may have contributed to the shorter shipping times, following supply issues with the iPhone 15 Pro Max last year.Some analysts caution that shipping times alone may not accurately measure demand without considering Apple's supply levels and allocation.