I believe that every brand/release of motor is different, and I agree that 6A is not the standard for all motors, but folks should contact the manufacturer for a respective brand to find out what the optimal current draw is for their motor. For example Trinity recommends 5.6A for the MonsterMax and 6.5A for the Punisher, I have not asked what they recommend for the XFactor. I know some team drivers in my area are recommending 3.2A for their Tekin motors.