Ron and Tom,
I understand that randori is different, which is why I wrote: In an environment that has assigned roles and If one person knows the other person will launch a physical attack in a specified manner I also understand that we're not talking about a fight, and all training is "false" in that sense.
I'm just wondering about the value of trying to move at the instant the "attack" begins when it's a training situation where I've been instructed to strike shomen and my partner has been instructed to respond with koshinage.
Would the method Ron mentioned be "better" than super-slow randori to develop timing?
Maybe I'm not expressing my thoughts well? (Generally tends to be true....)