If the idle on a v-twin is set too low, the off-idle throttle response will be "lumpy". If the idle on any bike is set really high (too high), you always start out off-idle compared to a normal idle setting. This gets you heading into the power band (v-twin or parallel twin of OP) sooner.
I think the best solution is to set the idle where your manual says it should be and raise the rpms with the throttle before letting out the clutch when you need a faster launch.