Blog Readability Test

I stumbled across this link recently, off a personal finance blog (but can't remember which one). You input your blog's URL, and it returns the level of education required to read the blog. Apparently, you must be at least this smart to understand my blog:

But what's the criteria? Too many multisyllabic words? Acronyms? The mind boggles....

Note: lovely little HTML snippet included an ad link that I removed.