I placed an on line order with Rockler late on a Wednesday night for 2 small items. I went with free shipping which indicated 6-9 days for delivery. I wasn't overly impressed, but it was free. I was amazed to find the package in my mail box that Saturday, meaning they got my order to me in 3 days.
I believe this was possible because the total weight qualified for first class mail, but I was pleasantly surprised nonetheless.