  Controversy over nature and existence of the velocity effect [G. Szenes,
Phys. Rev. B 87, 056101 (2013)], [M. Toulemonde et al., Phys. Rev. B 87, 056102
(2013)] reignited after new experimental data on swift heavy ion tracks in CaF2
was reported recently [M. Toulemonde et al., Phys. Rev. B 85, 054112 (2012)].
Here we show that results of the analysis in ref. [G. Szenes, Phys. Rev. B 87,
056101 (2013)] should be interpreted differently within analytical thermal
spike model. We also propose explanation for apparently missing velocity
effect.
