Actually, in a target shooting scenario, I disagree. If one takes the basic shooting principles, that is, holding the sights on the target and slowly squeezing the trigger until it breaks, the round will go center every time, no matter what gun you are shooting (assuming you have an accurate weapon). The problem comes in when someone gets too eager and squeezes off rounds too fast with not enough technique. Then, the more ergonomic gun may win because it has better natural pointability and therefore, follow up shop lineup.
I was simply saying that the inherent accuracy of the G19 is very close to the inherent accuracy of the 9c, meaning from a bench or someone who shoots both equally. A more ergonomic gun may mean faster learning and better from a point shooting standpoint, but really, as target guns, they will be equal if the user puts in the time to learn both. I've shot thousands of rounds through my G23, and am better with it than the 9c. But I'm sure when I've done that many through the 9c, I will be just as good with it.
I'm just trying to say, if you take a brand new shooter (for example), and give them a G19 and a 9c, they will not be very much more accurate with one over the other, since they haven't learned basic shooting techniques yet.
I am just trying to relate to the original poster, that since you seem "fed up" with the G19, it is possible that you simply have not put in the necessary practice to learn the basic shooing principles, since a very good number of shooters out there who have can get very good groups with the 19. I just didn't want you to make an investment in the 9c, thinking your shooting will instantly dramatically improve, and be disappointed when it does not.