only one mention noticed so far, but in my experience it is much more common to wind up flying through ones own wake turbulence which generally does not amount to much more that a "bump". however, on one occasion the conditions were such that it caused a brief encounter with vortex ring state. not a nice feeling but in a B2 (or other articulated rotor system) not a huge deal as a bit of a poke with the cyclic took care of it. (i rarely fly into airports that are shared by heavy jets)
it's not uncommon while doing production longline work such as seismic and you are looking for your pickup point in the bush.