Out of curiosity, I grabbed a random page (page 7), removed the sentence fragment at the end, and ran it through a readability tool I found here (http://www.addedbytes.com/code/readability-score/).

This particular one uses several readability calculators and gives scores for each of them, plus an average.

So, how did she do?

Flesch-Kincaid Grade Level 4.60
Gunning-Fog Score 7.20
Coleman-Liau Index 6.30
SMOG Index 4.70
Automated Readability Index 3.20
Average Grade Level 5.20

So.... She's writing, on average, on a fifth-grade level.

I am very tempted to compare this to her earlier books - the ones that went through many rounds of editing....