Based on the results of the big tournaments from last weekend (and my local events from the last month or so) and even GenCon, I've noticed quite a shift in deck styles being produced. Especially for decks that make the top 8 -- harder to say for everyone else because deck details have been limited.
I say shift because there seems to be much more variety. During regional season, the question seemed to be "Are you playing Martell Summer?" or "Well, what's your plan for playing against Martell Summer?" Some of the early wins were (nearly) identical Martell/Summer decks.
Now -- (from Calicon) the top eight consisted of Bara/Maesters, Bara/Martell, Lanni Hyperkneel/Shadows, Targ Dragons, Stark Siege, Greyjoy/Lanni, & Greyjoy/Winter. It just seems to me that things have taken quite a turn.
I think partly this is a testament to FFG's attempts to balance to the game through a diverse card pool (I always find new things each time I look through all the cards) and controlled erratas/restrictions.
And personally, I think it's great not to have one unbeatable deck. Reminding how happy I am this isn't Magic.
What do you think? Has variety increased?