Keeping the safety engaged until it is out of the holster is not the same as keeping it engaged until the sights are on the target. The 1911 safety can easily be disengaged during the presentation to the target. If drawing to low ready, keep the safety on. If drawing to fire, disengage the safety before full extension is reached -- when the hands come together on the grip or just afterward. At the point the final sight picture is attained the grip is fully firmed up -- the safety should be off before that happens. At least that's how I do it -- it becomes quite natural with repetition.