I'm gonna throw in my two cents, because I am a "young reader" (I'm fifteen). NuDune is shit. I've read the originals many times and their depth is wayyyyy beyond that of the crap one-level weak-story-lined things that pass as "DUNE" in bookstores. God Emperor I can just open up to a random page and find an awesome passage, and before I know it, I'll be twenty pages in after that passage. It is my favorite Dune book in fact. Currently, I'm reading Ulysses, by James Joyce, probably one of the three most challenging books written in the twentieth century. Give it a whirl, KJASF! I'm serious. Try it.
Anyway, now my point. The only kids stupid enough to appreciate NuDune, don't read. They watch movies and listen to iPods, but never venture into books beyond school reading. Trust me. I know kids who are among the smartest in the school who still consider reading beyond their attention span. If I admitted I read books twenty times harder than the crap we read for school, for fun, nobody would believe it. Yeah, KJA sucks.
(I will agree that Heretics is a bit unengaging in the beginning, but the scenes after the first few more than make up for it..the Teg scenes=bloody brilliant.)