For those of you who don't think physics is important. Of course, warmies probably don't shave, male or female. :)
Look at the last release. That's adhesion cavitation. It's a bit like toffee pulling out your tooth filling.
You can see on the chart that it is almost explosive. That pulls out any little imperfections in the steel, and works on grain boundaries. I don't know if the steel can be significantly improved. Perhaps ceramics would be better.
ps. I didn't like their non-physics explanation. It's clearly cavitation, which is the only thing that can separate steel grain boundaries. They must be just photographers. :)