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
http://www.residentadvisor.net/feature.aspx?1700
http://www.residentadvisor.net/feature.aspx?1701
[MINUS100] Plastikman - Krakpot (Moby Remix)
@ +Audioriver