Indeed.. but lets see what we have here.
You say, livestock is exposed to overly high levels of ammonia and nitrate accumulated over shipping. Well then keeping them in that bag of their water which has "overly high levels of ammonia and nitrates" for the 30 minutes of float time surely won't be any better for them.
The way i see it is, you put the water from the bag in a container, and then as you drip your tank water into the container(the whole drip acclimating concept), and then start to cup out the water as it accumulates, then most of the "ammonia" and "nitrates" will begin to diminish since the ratio of bag water to tank water is less. And assuming your tank is cycled.. you shouldn't have ANY ammonia, and little nitrates.
So i find the float method to be a slackers way, and less dependable, regardless of what saltwaterfish.com says. Since when were they acclimation guru's?. Floating is the sort of acclimation that petsmart employees tell you to do for their freshwater fish..so why would you ever do it for saltwater if they don't even sell saltwater livestock?
Also, i may have not found it, but where in this link does it say anything about NOT drip acclimating fish OR inverts? It says here on their page that the ONLY method they support is Drip Acclimation. misskeeter can you link me to where you found information saying NOT to drip acclimate coral or anemones?
This is the link i found saying they support drip acclimation:
http://www.saltwaterfish.com/Acclimation_ep_48-1.html
They also say this: "This method allows for the fish,
coral, or
invertebrate to adjust to your aquarium parameters at a pace that is acceptable for that particular animal."
And anemones ARE inverts.