Let's deconstruct, shall we?

Someone came out with this visual poster of Twitter, weighted by followers. What are the patterns here? Why do they have large followings and what do the do on twitter? Does topic affect it? Gender? Promotion? Community leadership?

 

It's no surprise to me that daringfireball and majornelson are there. Mac and XBOX fans, yeah. Easy following. We have some TV types also. The two Twitter guys Ev and Biz might be an exception, it's their product.

 

Have fun! :)

Done