Yes. As a calculation anyway. Feel free to run the numbers. I subtracted 1/2 coil for active coils and used 11,000 K for elastic shear modulus.
Measurements make a big difference when there are few coils.

But as a comparison, it should be ballpark correct.
When looking at the effect on the advance, its the rate multimplied by the distance moved. Because of the long loop, it doesn't extend much. And when used with light primary spring, it gets little assistance.