This thread seems a little dead, and I know I'm late to the game. I think if you take only mechanical factors into consideration, the original poster is probably correct. However, when you take other advantages to the long slides and other shooter specific variables, I don't see the wisdom in having an absolute statement such as the statement by the original poster. I know this is nearly 6 years running now, however I can't agree, given my specific circumstances. I carry a 34 with the RMR for duty, and a 19 with an RMR for off-duty. The consistency of looking for a dot matters to me, as well as the possibility of follow-up shots, and I do better with the dot then without. It could be psychosomatic, however if you shoot better with one than the other, especially with my very anecdotal vision issue, I think you should use whatever sights are best for you as a shooter. In addition, especially for duty use, the overall greater situational awareness the RDS provides flies in the face of the original poster's statement. Or at least who or whomever that statement was coming from.