Guy Kawasaki, who’s book Author Publisher Entrepreneur (APE) got me started in writing, linked to this really good article on contently.com
Interesting article about level and ease of reading different works. There is a test that can be done to gauge the ease and level of reading required for a particular piece. I did the first few chapters of Wall of Destruction and it came out reading ease of 75 (0-100 and 100 is easiest) and a reading level of almost 7th grade.
Now before you laugh. J.R.R Tolkien was about 6.5th grade and Tolstoy is 8th grade. I consider myself in good company 🙂
Give the article a read and find that most successful works (be it book, blog, magazine) are written for below an 9th grade level and have a high ease of reading number.