The opposite--hyperlexic.
My reading ability outstrips my comprehension--that's not a big problem, though, because at this point I can read anything written, and comprehend anything written at a college level, which is all I need to be capable of as a college student.
Actually, it never was a really big problem--by 3rd grade, my comprehension had caught up with my classmates', and that's when you typically have to start doing reading-comprehension exercises. I've always loved words and their definitions; missing the big picture doesn't pose much of a problem when you are interested in all the connotations in the words and the logic of a plot, and can put the picture together from the puzzle pieces easily enough.