Nope. I have won 1, 2 Played a little of 3 and won Liberation. To me the newer ones are too easy. All you do in big fights is hold block until the screen goes grey.
[quote]All you do in big fights is hold block until the screen goes grey.[/quote]1- That's all you've had to do in all of them
2- The screen doesn't turn grey
ACII has smaller counter windows, but it's the same concept. Although ACIII and ACIV are pretty easy in comparison to ACII/AC:B/AC:Rev.
Thankfully AC: Unity won't have counter attacks.