The shipping wait time for new third-generation iPad orders from Apple’s online store has dropped once again. A check of the store now shows that all models—including both black and white variants of either Wi-Fi or Wi-Fi + 4G models, across all capacities—are now listed as shipping within 5-7 business days, down from 1-2 weeks. Notably, this applies to the US and Canada stores; a quick check of Apple’s UK storefront shows…