Does this prove David Vizard's 128 lsa formula ?

Icetech said

Since we are talking cams i have something that is bothering me... This is the first time i degree'd a cam.. usually just went dot to dot.. My cam from howards said to install on a 103, but dot to dot gave it a 109.. is it normal for a cam to be that far off? i checked it like 5 times to make sure it wasn't me. Emailed howards and they said advance it to 103 so i did.. been bugging me since though. (i should have checked more cyls)

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Depends on whether they ground advance into it or not, it is commonly done, but not always. If they ground it straight-up, it wouldn't be uncommon at all, the intended advance(say 4°) + deviation in the timing set(say 2°) would put You off exactly that much. Even then, yes, sometimes timing set/crank-key/cam dowel or key tolerances can put You off that much.
If You did it right & double/triple checked it, You're good, if You want to check #6 to back it up go for it.