...than it would be in a honed chisel, etc, as the breaks are clean breaks and no polishing or grinding is done to them. what I gather from reading other technical documents is that the breaks can make things visually difficult to confirm and that it would be preferable to level and polish the surface of a test piece and then etch it.
I'm not going that far.
(I did send steve three subpar chisels, though - two that I allowed to get hot and sit in the forge too long because I was flapping my gums making a video, and a piece of 1095 that will benefit from quench oil that I'll get over the weekend or next week depending on UPS shipping time - parks 50 fast transition quench oil for 1095).
With my skill level, I may find what I found with XHP, and that is, do whatever you're going to do to shape a piece (in simple steels, forging, which does some of the heat cycling itself but leaves desirable deformations before heating to austenite), heat it quickly, a step past critical and then quench quickly.
We'll see if pictures prove that. If I'm right about that, it will more or less show that I need to control grain size or structure by hammering and then minimize high temp time to prevent grain growth.