My understating of the discussion is that the members are discussing "lobe profile," and not simply one degree of duration. Ken is a great Cam Grinder with vast knowledge, but he is constrained to his "pattern catalog." I've visited the shop in Vancouver, and they are well equipped, but, carry "their own concept" of lobe profiles.
I'd be happy with the results you have achieved. Some of us (me) are constantly seeking maximum efficiency from a pattern and have chosen "Chrysler" specific shops that have many years of eking out the most from the .904 lifter and its capacity to follow an aggressive ramp, broad nose and fast closing rate.
These "patterns" are not found in your average hydraulic profiles...
Post up a sound byte for us when you have a chance and happy motoring!