I'm guilty of never having dipped a coral.
I do inspect the coral well before adding it into the tank, especially for Aiptasia, which I have never had in my tank.
I would expect this to be controversial, but I reckon my tank has benefitted from the life that has been introduced into my tank from other tanks by introducing new corals and I wonder if dipping might have prevented this?
I should add that many of the corals I have bought have been bought from fellow reefers who have had well maintained tanks. Others have been bought from shops that have had healthy looking tanks.
Me too, never dipped coral before introducing it to the tank. I probably should but I see all those pods, worms, etc dying and I dislike it, even though that's the whole point. I do keep a bottle of REVIVE on hand for emergencies although the few times I've used it on ailing corals, I couldn't say one way or another if there was any effect at all. Actually I've had it so long it could even be out of date if that applies to dips.
Given the original poster's question, I did some quick googling and emailed a guy I know in Noumea (works in the field). Googling, I could find no convincing reason not to dip, on the other hand, most people promoting dips, also seemed to be selling them.
I haven't got the email reply yet.