so if you are a college professor looking for material from google you can go to the advanced settings and set it up to find higher reading level content...which will obviously change the serp rankings...
on the other hand if you are a 1st grade teacher searching google for material then you can change the settings to find lower kincaid reading level conten..which again will change the reading level..
listen to this..
"The better the readability of your web pages, the more people will understand your marketing message. The average web surfer has a very short attention span."
Which means that content that has a really high level of reading (as compared to the kincaid test) will actually rank lower because the average user doesnt read at a high reading level.
I bsay Whatever just do what you have to do..a combination of good seo and list marketing should still bring you money anyway.
write good content but be yourself...dont try to change your content to please the search engines. use it to offer a solution to your readers problems.. and write it at a reading level thats comfortable for you..also dont forget PPC and you'll be successful really fast!
Thats just my thought on the whole thing....what do you think?