I believe there is a Time/Force curve that has a significant impact on gains; however, I tend to suspect that Time is a more critical factor.
If we loosely chart “lb-hours,” consider it like this: 1 lb of tension for 12 hours per day = 12 lb-hrs. Hanging 10 lbs for 2 hours per day = 20 lb-hrs. I’d bet that the former would offer more gains over the long haul than the latter. And this is because when tension levels go too high, tissues tend to tighten, strengthen, even contract. But by applying milder tension over greater periods of time, those tissues (which are relaxed, stretched-out, not contracting) will surely fatigue - fiber by fiber - until plastic deformation slowly does its work.
The upside: you don’t need to pull like you’re trying to rip your cock off.
The downside: there are no shortcuts.
I totally agree. After a hanging session, even with minimal weight, I contact and my flaccid hang is notably smaller for hours. After wearing the PM, I get a long, thick flaccid hang that seems to last for hours.