Wow - the motherlode! Sounds awesome. I will let u try it first and then if the legend proves true, maybe I can join you the next time
You are dead-on regarding flavor variability. Even named cultivars, in my limited experience, exhibit this.
I've heard pros qualify their comments with phrases like "THIS year the fruits taste like ...."
To me it's part of the allure of the pawpaw.
So what are your plans for all the seeds you're collecting?