Well, that page is certainly special. Some of my favorite quotes:

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They believe it is possible for a child to purposely do poorly, or have anxiety affect the results. This is untrue.

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A lot of parents of gifted children with behavioral problems are often full of sour grapes. They resent children who are well behaved and focused, and accuse them of not being "truly gifted"...This is bullying behavior; it reduces normal gifted children to performance animals.
(Huh?)

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If you read new research conducted by cigarette companies stating that smoking is actually healthy would you believe it? I doubt it. So why are we believing research about "gifted" children conducted by those whose children are 2e?

The logical fallacies and lack of reasoning ability this person displays are...well, pretty typical of mediocrity. But of course, it's all my fault:

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You people are too thick to comprehend what I am saying.