A lot of what I'm hearing from the laser sight naysayers is about "looking for the dot", you shouldn't be focusing on the dot, if you are you're doing it wrong. You should be using a laser like a red dot sight - look at the target and superimpose the dot on it - think of it as point shooting with a reference point you can see on the target. If you're doing it right, the laser won't replace your iron sights, it will compliment them.
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper