I didn't discover SICP until after I had graduated from a good CS school. Its clear and away the best programming book I've ever read, even for an experienced developer.
Ha, this is exactly it! As an 18-year-old interested in computers, you just want to start writing iPhone apps and making the next big web service, but quite often those old geezers know better than you.
Catering to the things that 18-year-olds want has never really gotten us far in society.