What is a Blog Entry?

According to an Oregonian editorial on the new SAT essay test:
In truth, the 25-minute test measures teenagers’ ability to write glibly at length in a free-associative, unresearched and self-referential manner.
In other words, it seems the newest measure of college-worthiness is: Can you write a blog entry?

I think this is not what most of the blogs I read, as opposed to the one I write, are. Most of the blogs I read are researched, related to certain topics, and often are clearly objective, as opposed to self-referential.