criticsrant.com provides a tool where you can find what level of education is required to understand your blog (Readability of the blog). I immediately checked our blog www.retail-ecommerce.com in the criticsrant's blog readability tool and this is what i found... (See the Image)

Blogs are seen as a marketing tool by most of the online retailers. The main intention behind the online retail blog is to make customer aware about the products and services they provide.

So, i decided to check the readability level of top online retailer's blog.

Amazon's Book Store Blog - High School level

Ebay's Blog - Junior High School

Dell's Blog - Junior High School

Apple's Blog - High School

If you are an online retailer running a blog then check this cool tool to know your blog readability level... http://www.criticsrant.com/bb/reading_level.aspx

Note: This is only for entertainment purpose.