It was a happy day for me when DS's interest in books went higher level. I was so sick of reading those little kid books, over and over... Though I never minded Dr. Seuss.
Although my DS was an early reader, I don't think what we read to him had any negative effects on how he progressed with reading. I think that any exposure to language, higher level or not, is only going to help a kid to learn all aspects of a language, including reading. But this is just my own opinion, and I am not a teacher. For my kid, who was a whole-word reader rather than a phonetic reader, exposure to more words meant he could recognize and read more words early on.
