Length, trust me when I say you want to build up in weights. I was also like you. When I first started hanging, I found that I could hang very large weights from the get go. I started out at 15lbs and did three 20 minute sets. But, just like everyone on here told me even though I didnt listen, sooner or later it will catch up with you. I started getting bad injuries internally from the compression hanger I was using. So, I switched to various vacuum hangers, finally settling on the LG. But again, didn't learn my lesson, and got some pretty bad blisters that went pretty deep, and may have caused some scar tissue.
My new method is similar to most weight programs: find the max you can do, reduce that, and build on it. So, if you know right now that the max you can do is 15lbs for an hour, do something like this: week 1: 7.5lbs 3x20; week 2: 7.5lbs 2x40; week 3: 7.5lbs 1 x 60; week 4: 10lbs 3 [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]x 20[/words]; Week 5: 7.5 2 [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x 30[/words]; week 6: 10 lbs 3 [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]x 20[/words]; Week 7: 10lbs 2 [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x 30[/words]; Week 8: 10lbs 1 x 60.
Something similar to that should help you ease in.
Also, to answer your initial question: it really does vary between people. I've frequented this forum for years now. It's almost upsetting seeing some of the stories. Some guys will hang 5lbs and gain incredible amounts. Meanwhile, some guys won't see those same type of gains until they build up to extreme weights. PE is not just an exercise, it's really a process of self-discovery. You'll get to know your body, your limits, and your guideposts like never before.