I shoot a snub very well,but it did take a while for me to get there. I'll also say for me there is damn little difference between a 4" and 5" barreled auto or between a 3" and 4" revolver.
Depending on the pistol I agree with you. I know one handed there is almost no difference between my M&Pc and my regular M&P. Indeed, there is only about an ounce or so difference between the two.
A short aluminum 45 might be a good bit different though-say 25 ounces vs. 35 ounces for a full size.