Heh heh, I guess my snails just weren't sticky enough. I got 100 Nassarius from ebay, dry bagged, and only about 50 were alive, and of those, maybe 10 stuck themselves to the glass. The rest just either died where they landed or wandered off through the sand bed. I had the same question as to whether or not to drip acclimate them... on hind sight, I wish I had. I'm certain more would have survived if I'd drip acclimated rather than by just trying to stick them too the glass. Maybe it matters on how stressed their systems are. I would think that drip acclimation, if done slowly enough, would give them the same opportunity to self regulate as sticking them to glass would.
Only thing more dangerous than a 2nd lieutenant saying "In my experience" is a warrant officer saying "Hey guys, check this out!"