Again, I don't think the laser has no place...it most certainly DOES as another tool which we may utilize for conditions to which it is suited. But it's not the only tool and it should never be thought of as such.
There's an old saying: "When all you have is a hammer, everything starts to look like a nail." As shooters we need to recognize that there ARE other tools available to us...be they lasers, iron sights, scopes, or what-not. And, like any other conventional tool we may have in the garage, each is optimally suited for certain things and less so for others.
I do not doubt that some people here (or anywhere) may be better at using a laser sight than iron sights. They may even be better with a laser sight than many people with iron sights. However, individual performance is not the issue here.
The question is whether there is a significant difference between the two as applied to the broad spectrum of humanity with respect to the CAPACITY of one method as compared to the other based on how the human body and nervous system work together.
This capacity is based on the physical ability of a person to use particular sighting method to quickly acquire a proper target sight and actually place a bullet on target. This isn't based on choosing special circumstances that clearly favor one over the other, such as shooting around corners where visual sight alignment of iron sights is not possible. It's based on realistic circumstances in which both methods of sighting can be brought into play for the purpose of evaluating their relative performance.
It is my supposition, based on my layman's understanding of how the body and nervous system work, that the closer your physical skills approximate the natural, instinctive neuro-musculature behavior of the body, the quicker and more accurate a person will be with a firearm.
The moment we start moving away from this and incorporating the use of other senses and processes, then the brain has to take a larger role in processing this new data before translating that into the body functions that are required to make things happen. When we do this, it will result in an unavoidable increase in reaction times.