I as starting to think the main issue to be concerned about with acclimation is pH. If pH is the same, most of the other things are not as important, and acclimation does not need to be done over hours of dripping.
So far, I've never had problems with acclimation, and I've never dripped. I use a baster and take out most of original bag water, then add a squirt of new tank water every 3 minutes for about 15-30 minutes total (depending on difference in pH's). The drip theory is real safe though so if you have the time and patience, then it is the safest way to go.
In fringing reefs around islands, water salinities and temperatures vary quite rapidly due to mixing between (1) freshwater and saltwater, and (2) warmer surface and cooler deep waters. Yet plenty of hard corals including SPS corals proliferate in these areas.
Cheers,
sam