I would think that most kids could benefit from extra time to reach their full potential. I see students getting cut short all the time. We live in a very fast paced world these days, and the fast fish often gets the worm. The 97th percentile for processing speed is extremely high, even among the gifted.
DD tests as having a high processing speed but she has dyslexia and dysgraphia. She really needs the extra time for her writing and especially editing her spelling. Her brain works quickly but her output does not match what's going on inside her head. I just mentioned it to point out that an "extra time" accommodation is not ruled out by high processing speed. Sorry if I wasn't clear in my earlier post.
