Arthur P mentioned something...
That's had me thinking. It was related to how a Deflex riser nestles into your hand easily and repeatedly, ensuring consistent hand placement on the bow.
Now I'm wondering if it is the deflex/reflex nature of the riser, or the brace height that provides the forgiveness?
What would be the difference in a deflex riser with an 8" brace and a reflex riser with an 8" brace? Would one be more forgiving than the other?
If deflex would be, I think it'd be neat to see a very fast bow like the BT Black Knight with a highly deflex riser. That'd put the brace around 7-8" and should still be a screamer in the 320s or so...