Hearthpwn

So, i play a burn mage, and 9 out of 10 droods are Jade. I switch to hunter, and 9 out of 10 droods are aggro. Exact same time of day and rank, for days on end. I think I'm past variance at this point, so I was just wondering, does anyone know about the mechanics of the matchmaking system? Are you grouped in a certain way, against certain decktypes or whatever, or is it simply a "random coincidence"?

Randomly by similar rank. There is no conspiracy. 

http://www.hearthpwn.com/news/2177-is-matchmaking-rigged-max-mccall-explains-the

http://www.hearthpwn.com/search?search=rigged matchmaking