What's so great about Nanyang primary school? Why is it considered the top school in sg?

While Nanyang Primary School is indeed excellent in academics, I reckon a large chunk of the school's intrigue and reputation comes from the fact that it is a traditional household name with alot of impressive associations. I'm not saying that all parents are that way, but I know some who will go to the ends of the world so that their child can be enrolled in a school with such a rich history and legacy. Which is fine if the child can keep up, but if he cannot, then what's the point. All schools are at the end of the day, educational facilities aimed to harness a child's full potential. I reckon it's alot to do with the child as well -- so many success stories every year from both "top" and "neighbourhood" schools.