iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Apple's iPad 2 Shipping Estimates Drop to 'Within 24 Hours' in U.S. and Canada
Shipping estimates in Apple's online stores for most of its other markets appear to remain at 1-3 business days, although they too may be updated in the near future to shift to the faster turnaround.
Apple's online store shipping estimates for the iPad 2 quickly ballooned to 4-5 weeks just as the first deliveries of the device began back in mid-March. Estimates slowly dropped over the following months as Apple began to catch up with demand, finally moving to 3-5 business days just under a month ago and then 1-3 business days the following week.