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It is valid as a pre-shave test for personal use, because you generally keep the variables the same, and because you generally use the same hair. It is however a ridiculous test for comparing results...

Don't forget the exact angle of the hair in relation to the edge in a 3D space.
And the length of the hair that protrudes beyond the edge.
As soon as we include those factors, we have to agree on...

I've been questing a lot, but those damn monsters just keep failing to drop the mythical HHT6 skill. This is world of warcraft all over again.
Though I have to say that my hairline keeps receding...

That is what arm hair is for :)

The HHT is notoriously dependent on the actual hair, used for the test.
As such it is pointless to get worked up about HHT 'levels' because they won't compare.
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