I don't know about the aluminium shafts. but when I went to
dogbones 8/V2.0 Nitro & Gas(steel) all four wheels on my 8e 2.0, vs the stock cvd's, I could tell it have more snap off the line, on pavement. The only thing I can figure is the dogbones don't twist or wind up like the cvd's. Their thicker diameter, than the cvd's. To me, that equated to more instant throttle response.
On a side note, I run SP Racing tires and wheels sometimes on the street, their shorter so a regear is necessary. My grandson was here the other day and said "will it make smoke the wheels?". I put my foot in front of it and gave it full throttle, on pavement, and it smoked all four tires down almost instantly lol. He was in awe lol.