With NRO, if they do not have your shoe in stock, it seems to me that you need to expect the worst as far as wait time. If they have your shoe in stock, it seems they'll get it to you in a week. Even with the 25% off during the week of July 4th, I decided not to pay for shoes that were going to supposedly arrive in September. I suppose if you know what your getting into with NRO in advance, it's not too bad.
I found out about NRO and the 25% off sale on this site and ordered a pair of shells. They responded via email and explained that my order would be delayed up to eight days. About two weeks later, the sent am email canceling my order.
I thought perhaps the 25% off for Aldens was a mistake. They have the shoes I tried to order on their site now.