I would imagine Rapid Exhaustion Dev. is a relative and subjective term to each of us. That said, edge effects and more importantly micro contrast manipulation / control is a direct product of developer exhaustion, reduced agitation and length of time in concert with one another.
Originally Posted by Robert Hall
I have used strictly FP 4 and HP 5 and Pyrocat HD for nearly 10 years with Extreme Reduced Agitation development and can speak to almost any environmental conditions which can be photographed.
I have and will continue to say, the process, as near a magic bullet as you could hope for is much more about the creative manipulation of scene contrast than any sharpness gain, perceived or otherwise.
If there is interest I can share what my HP 5 development times are.