ikndaisy11,
優才 really gear for talented kids; at least that's the purpose of the school. I think the real talented ones if they are not taken by super famous schools, that would be one of the choices.
"那若果小兒不是資優, 是否不適合就讀呢?" -- my feeling is yes. Why would you want your kid to study in a school that targets only for talented kids if your kids is average / slightly above average?
音小: their curriculum sounds attractive. But if you don't want to develop your kid to have music talent, or if your kid is not interested in music, I don't think you should choose that school because "music" is their focus.