FR is not a blog, and predates blogs by a decade. It's something else. An information exchange? Blogs have one or several authors, whose personality and indosyncratic opinions tend to drive the content of the blog. FR has tens or hundreds of thousands of authors. Blogs usally have at most one or two postings a day. FR has thousands.
I don't think leaving FR out of the blogoshphere review is wrong, unless the DUmmies are there.
Even then Dummie Underground and Free Republic are not blogs, IMHO.
Definitions change over time.
..we are the Blog....resistance is futile..