I often wonder if the slant razor fashion isn't just a result of confirmation bias. Some reviewers have equated them to road graders, but my stubble doesn't grow by the cubic metre and doesn't need that much rinsing to get it out of the way.
Seems to me that (other things being equal, eg. blade angle) the action of a slant razor should be pretty much the same as a normal razor, given that the blade essentially meets the hair at much the same angle to its own axis. If someone can demonstrate that I'm talking shit, I'd be interested to know how.