Well, I'm not a chainsaw racer, just a firewood hack, but with the various wood densities that I can end up cutting during a session - Crikey, I can go from one end of the density spectrum to the other.
I think the concept is valid and the RSC raker seems to support it. I'll just have to keep tweaking the raker a bit at a time and see where I end up. I think that nipping the edge off the side of the raker at maybe a 10 degree angle, a little bit at a time, could be another possibility of tuning the raker ( I don't know at this point, just got to try it on a few chains). - Everybody's mileage will vary, and what I may end up with in my area of Oz likely won't work in other locales.
I expect that there is some relationship between the 'up' angle and the width of the raker. Throw in a bit of 'tuning' with some tweaking of the edge/s, and ... who knows.
Another disclaimer, I do love it when some tweaking works out and I get a bit of giggle out of it (I use to build racing bikes, and tuning gets in your blood like some sort of alien virus).