I would say no, just make sure everytyhing is the same... temp, pH, salinity etc.
I would always acclimate corlas, some corals just won't make it without good acclimation.... clams, some sps and others.
It's very easy to do, I use the drip method. Just run one end of an airline into the tank, then tie off the other end so when the water siphons down it is restricted....and drips.
This is just about the best way I know of to acclimate corals.
~~~ Hey bondenaso, sorry didn't even completly read your post! I guess we agree on acclimation then