Damn delivery guys... never gentle.
Oh yes, at least an hour after that ordeal. Also make sue that lighting is dim, as just openning the box can shock the fish badly. I always aclimate with teh bags floating IN my tank, so the temp stays constant, removing the bag to pour off excess water midway through the acclimation (then replaceing the bag in the tank, of course...)
Keep us posted on how they do!