I was also read Dune aloud as a kid! Though I think I must've been older by then -- 12+. Definitely missed most of the subtext, though... Just like watching Forrest Gump.
No, I actually read Dune myself. I thought it was a book about political intrigue, crazy sci-fi and guerilla warfare, great stuff to a 9 year old. I was told later that it was in fact about US foreign policy with regards to the middle east.