I think if you're more specific on the types and not just the S/N divide you might find a relation to which types read more fiction than non-fiction or which types read more non-fiction than fiction. I like both. Lately I've been reading more non-fiction, but I definitely like my share of fiction.
Another fiction reader here - I do tend to prefer fiction to nonfiction, although I enjoy how-to books (mostly in the animal category) more than, say, a biography. Everyone in my family reads voraciously - the librarians all knew all of our names as kids.
NONE --I repeat--NONE of the people who prefer Sensing in my family think it's "exhausting" to read. In fact, my sister (SJ) and I are both librarians, and we read all the time for pleasure, and my SJ dad reads all the time for pleasure too. And a lot of my librarian coworkers prefer Sensing too, and they all read for pleasure. Seriously, if I believed it was "exhausting" for Ss to read, then I'd have to believe that every single library patron also prefers Intuition, which is totally and completely out-of-this-universe ridiculous.
Jeez, I'm so TIRED of all the nonsense about what it means to prefer Sensing!
Well, given that the quote comes from a book written by the person who created the Myers Briggs, I'd think the actual quote has validity. That's not to say though, that what I said is true. Apparently, I've misinterpreted the quote. The idea of Sensing isn't from Isabel, or Katharine, though. It's from Jung. I understand you getting frustrated with the misinformation. I'd like to say that the word exhausting isn't a good measurement. However, from the quote, I just took from it that the act of reading, the "translation of symbols," is a simpler task for Intuitives.