At least, it's written by people with more formal education
Normally I don’t like to make blog posts consisting of a title, an image, and nothing else, but in the case of explaining Tumblr, that’s pretty much all there is to it besides: slutty Alice in Wonderland retreads and photographs of tattoos.
PS: here is my Slutty Alice in Wonderland and Tattoo-free Tumblr.
raincoaster 
I thought I didn’t get tumblr, which made me wonder if I’m getting old, but then I realized that I just don’t like it. This description sums up perfectly why I don’t.
I just use mine as a storage cabinet, which explains why I have hardly any followers there; I’m not building for the readers, I’m just using it to bookmark things I want to blog later. I wrote a post on that:
http://raincoastermedia.com/2009/03/04/tumblr-reconsidered/