knohamaru it wont be settled till i see itachi fight someone with similar abilities to gai but more powerfull. then it will be settled, at the moment everything points to yes it does work. not a single piece of hard evidence says it doesnt. not one. you can sit there all day and say how much better itachis sharingan is than kakashis but untell you tell me HOW its better (apart form one technique and stamina) then its a worthless point.