I would first wade through the inflammatory rhetoric to ask this person to give statistics on the education level of JW's compared to the rest of society....or other religions for that matter....
Unitarians usually run #1 with nearly 50% having advanced college degrees. I was brought up Unitarian my father has a Masters from MIT. My mother has a Masters in Education. All four of my grandparents had advanced degrees. I married a JW. None of her parents or grandparents had any college, much less advanced degrees. They were all raised as JW's.
I guess it depends on your definition of education.