Actually this is all correct scientifically, although nothing good comes of trying to sell ideas to the media in the way they are doing it.
These ideas have indeed been around for a long time and I knew some of the people in the 1990s that were developing the theory and the experiments for light. More commonly then they were known as Laguerre-Gaussian beams after the mathematical functions they are based on.
The only difference from normal light is these beams have a helical wavefront with a phase jump and n complete rotations for each wavelength propagated if they possess n units of angular momentum. If you look at some of the articles for the RF work they just use a dish which has been warped so that it is in the shape of a spiral; this leads to a shift in the phase that is a spiral and the split is the phase jump. For the light experiments it is more common to use a holigraphic plate with a phase discontinuity since it is harder to impart phase directly as the wavelength gets shorter.
Note, however, that in the RF experiments they only use one unit of angular momentum. There is a reason for this… the more angular momentum you impart the more the beam diverges. That is the main issue. It was long suggested using multiple beams with different angular momenta in light communications but as you increase the number of bands it becomes harder; for the higher bands the beams diverge and noise becomes an issue.
Note also that the basic concept requires the paraxial approximation, i.e. a beam, not just RF going out at all perpendicular angles like you get with a dipole. Hence why they are operating with microwaves where a beam is more natural since you can use a dish.
So, nothing wrong with the science, but maybe a bit too much hype,