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\item {\it What should the time-scale be from physical reasoning: what is the physics behind establishing the flow profile $\vec{v}(\vec{x})$ in the fluid around the DNA? (Read \citet{Broman_Rudenko_2010}).\\  Which process (sound or vorticity) carries more momentum?}  \item Another thing to consider: {\it does it even matter?} The time-scale they use is larger than the sound-time, and places a more stringent test on the steady-state assumption. So my objection would only strengthen the conclusion. The vorticity moves slowest, and the fluid velocity profile might only assume the anticipated form once this final piece contribution  has arrived had time  to distance $\ell$ from influence  the DNA. entire profile.  \item Could the problems in Payam's other paper conceivably be explained by this phenomenon?