Yeah I heard some people say that before, but that isn't the main reason for poor test results. The main reason for poor test results on verbal reasoning and reading skills is NOT reading!
If you read all your life you will do well on the verbal reasoning and reading sections. (Verbal SAT) The key to doing VERY WELL on the verbal sections on the SAT is by reading when you are a very little kid. It has nothing to do with any "bias". The younger your age is when you start reading the smarter you will be. No joke. All of the most intelligent people in the world have one thing in common, they started reading when they were very little kids.
For example, my sister and I both came to the USA in 1993, neither one of us can speak any English back then. However my younger sister have always LOVE to read. She started reading when she was 4 years old. By age 8 she has her own library in the house! She reads everytime she has a chance and she loves doing crossword puzzles etc. Me on the other hand, hate to read, I hated school (even in high school I never studied b/c I hate it) When I was a kid I just watch TV or go take ballet lessons, I NEVER read anything, and my parents would yell at me but I don't care.
My verbal SAT was a 520, My sister's was a perfect 800. (Her GRE Verbal was also a perfect score and her LSAT score is almost perfect) We grew up in the same enviroment, had the same parents, went to the same high school, parents were always fair, etc. But her score was perfect and my was poor. Why? B/c I was LAZY. No other reason. If I started reading when I was 4 years old like my sister did then I would not have done so poorly.
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Poor test results have less to do with "bias" than it does with a person simply NOT reading when they were kids.