Well since Jelqing is a manual excercise some people probably just don't do it hard enough so basically those 1000 reps are baby massages since some people have a lower pain threshhold than others.
Also, over time any Penis Enlargement excercise will toughen up both the ligaments and the tunica through the relative reduction of elastin to collagen so you need to stretch harder and harder to get the same results so once their newbie gains are over, they gain nothing because they are not upping the intensity.
Someone on Thunder's used the analogy as a guitar player that after playing guitar nonstop for a month he has badly calloused fingers and the callouses eventually subside with rest. Of course callouses are different than collagen buildup in the penis as a result of stress, but the analogy is basically the same in that you need to give your body time for the tissue to loosen up a bit before applying more stress to it.
So, I was thinking of changing my routine to a 3 week cycle of focusing on ligs, then the tunica, then girth, and then repeat the cycle but I figure that was kind of dumb because I could be hitting two sections of the penis at once and let the other one rest for two weeks.
So now I have a 6 week cycle that seems to be going well (have not lost any length while not doing tunica work) that goes like this:
First 2 weeks - Ligs plus girth
Second 2 weeks - Ligs plus tunica
Third 2 weeks - Tunica plus girth
The penis actually has two layers of collagenous tissue, one layer running vertical to the base (straight out) and the other going up to the top in a cylindrical fashion. I suppose for length the vertical tissue is what allows the penis to stretch out and the cylindrical tissue is what is mostly stretched when the penis expands in circumference.
So I figure for the most part you can safely rest one section of the penis for two weeks at a time and therefore you won't need to take complete breaks. So last week I had been doing ligs plus girth and this week I will be doing ligs plus girth and then hopefully when I do ligs plus tunica next week my tunica will be sufficiently deconditioned a bit to get good gains over the next month of working out the tunica.
Nevertheless, people who jelq and only jelq I think will on the majority probably run into the problem of not being able to apply enough force to actually stress out the tissues in such a way that they grow in an elongated state. In other words, your penis stops acting like a rubber band and instead turns into a rope that won't stretch even a little bit no matter how hard you tug. I know that if I don't take breaks from lifting my muscles get as tough as shoe leather and I sometimes lose some flexibility, especially if I get lazy on the stretching, so just like I don't want my muscles to become muscle bound and inflexible, I don't want my tunica and ligs to toughen up so much that they will just refuse to stretch anymore unless I place so much stress on my penis that instead of microtears I get a massive tear requiring surgery.
I have a theory on the relative difference between the frozen shrunken state (basically dunk your penis in cold water for a while to get your minimum flaccid size) length of the penis and the maximum flaccid stretched length of the penis when completely warmed up that I believe is key to determining the future rate of gains since from what I have read that guys with poor flaccid hangs tend to get much larger gains in flaccid size than erect size initially but they also happen to be the best gainers overall in erect length as well.
So the idea is that it is not whether you start out at 5, 6, 7, or even 8 inches in erect length, it is the relative difference between your frozen flaccid size and your maximum warm flaccid stretched length that gives you an idea as to what your probably future rate of gain from Penis Enlargement assuming all other things being equal.
I started out with Penis Enlargement with just stretching and a modified form of dry jelqing myself and when I started I was probably about an inch in the frozen flaccid state in length and 2 inches max in normal flaccid length and around 5 inches bone pressed in erect length. Now after 5 months I have gained 2 inches in erect length but 2 and a half inches in normal flaccid length and 2 inches in frozen flaccid length (3 inches in frozen flaccid length).
So my ratio of frozen flaccid length when starting out with Penis Enlargement to whatever my erect length was (never took flaccid stretched measurements then so I am assuming it was not much different than erect length) was 1:5.
Now I have 3 inches frozen flaccid and my flaccid stretched is 7.5 which is a ratio of 1:2.5
So basically my guess is that this ratio somehow correlates to the rate of gains people have if you were to chart this all on a graph and by this logic when I started Penis Enlargement I should gain about twice as easily as I do now and based on my progress this is about right since I started out gaining about half an inch the first month (maybe a little more), and every month after that I have gained a little less.
I will write more up on this theory when I get the chance, but this theory isn't completely new, just I have not seen anyone talk about minimum flaccid length which I call "frozen flaccid length" versus maximum flaccid stretched length. My guess is if your ratio between the two is pretty low, you need to do anything you can to increase the elasticity of your penis which for non-newbs to Penis Enlargement may mean taking a break of some sorts.