Theory #1.- The season JUST started and the player which where Legends in the previous one are grinding to get back ASAP and thats why there's a lot of counter/top decks around middle/low ranks.
Theory #2.- The meta is changing towards Control decks. I am not too sure about it but I havent faced many other decks besides Druids/Warrior/Handlock. No Rogue/Priest/Mage yet in around +/-40 games I kid you not.
Theory #3.- Luck/Variance. Maybe I am just having a very long streak with no good matchups and its all about variance.