With a tricycle undercarriage aircraft where the main wheels are behind the longitudinal pivot point, you will increase the TO distance if you haul back before the wing is ready to fly because you are placing downward pressure on the mainwheels.
Similarly, with a taildragger, you will increase TO distance by pushing the nose over to wings level for the same reason.
Good airmanship incorporates good techniques and you will only learn this by reading what the manufacturer reckons is right and then using sensible moderate control inputs.