I've noticed this lately in coastal California of all places. I needed batteries by Sunday morning, was ordering on a Thursday. Plenty of 1 or 2-day options when searching and adding to cart, then when it came time for checkout... none of the 5 options I tried could be delivered in 2 days!

It seemed the interface was designed to hide the true delivery estimate in the last step and trick me into thinking the item would arrive on time.