It may be only SAs get that courtesy (of not having the packages opened).
I don't mind if that happens that much, but I'm not sure I like that they let other customers look at and try the bag on when there are no other bags like it in the store...and they do! I've seen the way some women let their kids play with (and abuse) bags in the store. I'll probably receive flack from mothers here on this one, but honestly, this really bugs me. The SAs never say anything about it either. I saw this happen a few weeks ago, and the kid was pulling the bags on lower tables off and into the floor while dragging them, and nobody said anything about it. The mother was completely ignoring the situation. So my fear in this case is that a kid with sticky fingers will touch my newly ordered bag or scratch it, LOL! A couple of the stores I routinely visit have let me try on bags that people have ordered and are in the back, so I think this is very common. I almost don't even like to touch a bag that's brought out for me to look at if I know it's someone's order! I admit I've bought display bags before, though, so I guess it doesn't really bother me THAT much, LOL!!
I think overall I would rather them get the order RIGHT...and if they open it up, or you do, then you know that what you walk out with is the right item. That happened to me a few days ago with a wristlet, and it was an extra trip to a local store for me to exchange. I made a vow never to leave the mall before checking that what is in my bag is the right thing. I guess they would make you open the box anyway at the store, but at least you would be doing it. Every order I have ever had sent to the store had already been opened and was wrapped in tissue paper and in a shopping bag waiting for me.