http://www.sciam.com/article.cfm?id=the-secret-to-raising-sm...
This division into 3 kinds of kids has an underlying assumption that kids can be classified by some innate characteristics.
Rather than putting effort into "identifying gifted students", maybe we should concentrate on finding more effective ways to teach everybody. Getting rid of grades comes to mind as one way to help convert "high achievers" into "gifted learners".
I wonder if Kingore, the author of this article, has written anything taking into account mindset research like Carol Dweck's.
I had to take a survey course on education research during my postgrad days - the first thing the prof said was that basically education is a research ghetto where every half-baked methodology, and every bit of post-modern drivel can find a home.