ORIGINAL: abufletcher
That's part of it. But scale features like the (correct) scale size of the rudder and elevator will make a model fly more like the original. If the original had a teeny rudder and thus lacked lateral stability, then a model with a teeny rudder will probably act the same. This isn't related to either the Reynolds number or scale loading.
Sure I agree, by all means scale all flight components properly, but after that those Reynolds numbers, loading, and damping issues are in fact a huge part of the problem to flying scale like with the smaller stuff...
Bob