I think that he is referring to the torque-rod arms, not the push-rods. The length of the torque-rod arms definately makes a difference in the amout of control throw. The shorter the torque-rod arm (or the lower the position of the clevis fitting on the arm), the greater the control throw. In the case of the servo horn, the longer the servo horn (or the farther out toward the end that the pushrod is fitted) the greater the control throw.

You should attempt to have the servo horns straight across at neutral control input, with both push rods fitted to the same hole on either side, & both torqe-rod fittings at the same height. If one aileron "throws" less, lower the height of the fitting on the torque rod. Keep adjusting until throws are the same on either side.