Bloggers: the loud minority or another dying breed?

I subscribe to 20 blogs.  I have left my reader unchecked for about 6 weeks as a test to build up 717 unread posts.  Here are some interesting stats:

1. 550. (Mashable)
2. 71. (AllFacebook)
3. 17.
4. 17.
5. 12
6. All others in single figures.

I was quite surprised by the stats.  You could of course take out Mashable as it is more of a publication really which still means that the majority of posts is by 1 blog. 

So are bloggers dying off?  Do I need a new list? How does your RSS list compare?