Dipping corals is about as overboard as QTing fish... YOU SHOULD DO IT... I know 90% of the reefers out there don't but you SHOULD! Like Bryan said, is it worth the risk to you?
Alan, the guy from Coral Gardens was saying that about acclimation of corals not dipping. If you listened to him, he went on for about 10 min on the importance of dipping. You are right, most corals do not need to be acclimated but ALL need to be dipped!
I dip EVERYTHING that comes into my tank (except and invert). EVERYTHING! Fish get a temp and PH adjusted FW dip with Meth Blue and then QT. I do not QT corals but that is mainly because all my QT tanks have been taken up healing other people's fish because they do not dip and QT. All my corals recieve a SW Dip with Pro-coral cure. You would not believe the stuff I see drop off. Flat worms, red bugs, pods, worms... Take a trip to any LFS out there and I gaurentee you will see something in their thanks that you would not be so sure you want in yours, once you know what to look for. Heck there is one LFS up here in Gwinnett that is a red bug breeding ground.
So to make a long lecture short, save yourself the heartache and dip like everyone says you should. You might be ok for a while, but in the long run, just like a trip to the red ligh district in Bangkok, you are going to catch something that you did not bargin for!
P.S. if anyone ever wants to know how to QT or dip something, my door is always open!