Does this prove David Vizard's 128 lsa formula ?

I've been doing some reading and stuff.

The formula used to get duration "LSA+ (overlap÷2)x2= Duration", is it used by many cam companies?

I noticed that the formula calculates with the same duration using the same 110 LSA and overlap as the multple different Comps cams that I checked, like identical.
However when I checked a cam from Hughes I don't get the same results. Also the cam from Hughes is a split duration cam, so maybe I did something wrong.
Also when checking the specs and stated idle and driving characteristics of the 110 LSA Comp cams, I feel the BS that I heard in the past about LSA was clearly somewhat BS. But I do see why people assume it's the LSA that is responsible for the idle and other characteristics as changing the angle of the lobes changes the overlap, but Comp Cams shows that changing the LSA is not entirely necessary and does it with different overlap.
Or at least this is what I can gather, but do correct anything I may have misinterpreted.