Note on "Sonic Mach cones induced by fast partons in a perturbative quark-gluon plasma" arXiv:0802.2254

We make remarks on Neufeld {\it et al.}'s [{\it Phys. Rev. C} 78, 041901(R) (2008), arXiv:0802.2254] paper especially about the Mach cone formation. We argue that the original bow shock structure (as a fast parton moving through a quark-gluon plasma) has been smeared out after the approximations made by Neufeld {\it et al.}