While I think that the original statement from the young woman is an unfair generalization about her generation, I also think it's unfair to say that under-30's only read mangas and shampoo bottles.
Personally, I'm over 30 and I can't get
enough shampoo-bottle content for my Sony Reader.
If you're like me, check out:
www.shampoo-labels.com/Head&ShouldersVol1.lrf
SPOILER: The last line is "Repeat"