Guys remember BH/Adorama/Beach close early on fridays and are closed all day on saturdays due to religious reasons. They will put new items as "in stock" on fridays knowing they cant ship, to drive up orders as others stores dont have them (they dont either and they know shipments come on mondays)
I can't speak for other retailers, but this is 100% NOT true for Adorama!
If you see 'IN STOCK' on the Adorama website, it means that the items have been unpacked physically scanned into our system and are sitting on the shelves. Nothing more or less.
We NEVER indicate that an item is in stock if it is not; for one, because the system isn't configured that way, and second, because we would look like complete idiots if the expected shipment didn't arrive due to eg weather prolems or carrier issues.
If it says IN STOCK, it is on the shelves. (However, if the number of back orders exceeds the number of units available, as soon as the final piece is scanned off the shelves the IN STOCK notice will disappear)
This video is a couple of years old, but it gives you an idea of how it works: http://www.youtube.com …wydXTTIKo&feature=related