I think the plasma region has a different kinematic viscosity than the un-ionized region. This should change the Reynolds number (ratio of inertial to viscous f

I think the plasma region has a different kinematic viscosity than the un-ionized region. This should change the Reynolds number (ratio of inertial to viscous forces), and that should profoundly affect things like flow separation, turbulence onset - lots of things that matter in flow over airfoils. There's been work on kinematic viscosity changes due to plasma effects in plasma torches, but I can't provide links right now. It will be interesting to see how this holds up in real flight conditions: icing, bug splat debris on electrodes, low pressure at high altitudes, and how much electrical power is needed to sustain the benefits. Cool work.