It's list of lists time. Slightly different take here based on Labels, but they don't say what it is about the Labels that gets them included. 
http://www.residentadvisor.net/forum-read.aspx?id=215717
Like one of the commentators, I think Samurai Music & Auxiliary should have had a look in.


RA Forum: RA Poll: Top 20 labels of 2012 »
Forum: RA Poll: Top 20 labels of 2012