Had several that were off that far. In fact, one entire summer was wasted fixing stuff because we were not decreeing cams going out the door. And they were using reground cams.
I think to save a core, the regrinders will let the indexing be off to make a grind fit. Just my guess, but I've seen it so many times it's not funny.
As long as the cam is timed correctly you can forget the dots aren't even there. A quality gear drive has no dots. Dots are for the factory to slap an engine together. Anything other than an OEM should be able to degree a cam and should be doing it every time.