From: KokoroAkechi | #046
At very high difficulties it actually instantly reacts to all of your inputs (faster than humanly possible) which is why it can like instant guard break everything you do
I'm not sure if this is accurate.
It seems to me like there is more of a "probability of guard impacting" that is generally in effect, but then when they break your attack you can still break theirs and then they are less likely to break the next one. It just seems like there is ALWAYS the chance they will have the AI reflexes to break an attack, but it gets lower the more you match them.
Granted I've still had epic encounters with like 10 straight broken attacks going back/forth but as long as you are keeping up with them then eventually they let it through. Also it taught me to not always respond with a predictably quick attack once I impacted an attack. Sometimes simply pressing nothing for a split second and then the attack is enough to throw it off rhythm and that is a technique that translates well into versus humans.
--
~Ç~ http://img.imgcake.com/AlecTrevylan006/fdshieldpngyn.png Eff_Dee
http://img.imgcake.com/nio/9fdpngys.png