This is an excellent list.

Here are a few more from a prior crowd-sourced list and discussion on this topic... a roundup of myths about the gifted:
http://giftedissues.davidsongifted.org/B...html#Post161736

Originally Posted By: BenjaminL
6. The gen-ed classes suffer from the missing gifted students.
I believe the research summarized here says that gen ed kids actually perform better and make greater gains without the gifted kids. Essentially with the "gifted" kids gone, other kids now have the opportunity to shine... be at the top-of-the class... may speak up more... must rely on themselves.