I spent the entire 6 years of my middle + high school years without reading a single fiction book that I wasn't assigned to read.
Graduated school with 90+ average in all maths and sciences (except Bio); fluent with 8 different web, industrial programming languages; and got into one of the best schools in the country with two thousand dollar scholarship.
Yea, I've never read harry potter or whatever other book, and I still kicked more *** in school than your so called "bookworm".
Update: 90% in English, you really don't need to know that many vocabularies. You just need to know how to write an essay (which is like super easy), and how to read and write.