  Recently, we showed experimentally that light carrying orbital angular
momentum experiences a slight subluminality under free-space propagation [1].
We thank Saari [2] for pointing out an apparent discrepancy between our
theoretical results and the well-known results for the simple case of
Laguerre-Gauss modes. In this reply, we note that the resolution of this
apparent discrepancy is the distinction between Laguerre-Gauss modes and
Hypergeometric-Gauss modes, which were used in our experiment and in our
theoretical analysis, which gives rise to different subluminal effects.
