Genes for being more responsive to one's social environment not all positive effects?

There's a most interesting article in the second-last New Scientist issue about genes that can apparently affect the social development of kids. ADHD and "highly sensitive persons" are some conditions referred to in this article.

Orchid children: How bad-news genes came good.
01 February 2012 by David Dobbs
New Scientist.
Magazine issue 2849. p.42-45.
http://www.newscientist.com/issue/2849