Someone went through the diligence of getting those pictures in our library here:

Edges produced by various hones - Straight Razor Place Library

Take a very close look at the very edge of the feather blade. See nothing (I see nothing). "more nothing" than you see on any straight blade. Or maybe it's less nothing. Whatever it is, it's initial sharpness will be higher and the edge is as near perfectly straight as probably any mass produced metal item in this world. That is a transient sharpness, too, so shooting for it is going to give you something that is that...very transient.

In the middle of the range that glen talks about is an edge condition that is achievable, maintainable and not transient. Meaning every shave feels the same every day. And martha stewart would call that...a very good thing.