When we talk about stall speed we are referring to the RPM at which the clutch starts to engage. Not when the bike starts to pull away, but more like the friction zone such as a lever clutch bike would have. You want to stage just below the point where you feel the bike start to 'bump'. The chain sort of bounces, the bike tugs forward a little, you want to be just below that point, so that it will sit still without effort from the rider.

Having to hold the bike back with either your feet or the brake will just put extra heat in the clutch and wear away the fiber material in the staging beams.