The HHT is one of those classic internally consistent measures. If you persevere long enough and pay careful attention for long enough, the HHT works fine for your hair and for your razors combined with your hone types (assuming you can find a hair type that "works" for you).
Unfortunately what works for you may not work for others. The way I like to view it is there is one HH *technique*, but infinitely may HH *tests* out there.
The technique is to hold a bit of hair to a sharp edge and see what happens.
The test is what happens for *you* and how that correlates to *your* shaves using a particular razor honed in a particular way on a particular set of hones, and stropped on a particular type of strop, and how those things interact with your particular facial hair at a particular length using a particular shaving angle and particular shaving cream/soap after your particular beard prep on a particular day with particular weather at a particular time. Etc.
We tell people to use the HH test, when what I think we mean is the HH technique. And that is why we have these same arguments every 6 months.
James.