I has a theory
Just from reading a few people’s stats and conceptualizing, it seems like whichever of your wiener’s dimensions (length or girth) is salient, that’s the one that is going to be easier to gain more of. For example, say you are 7.75” by 4.75”—you have a long and relatively skinny wiener, or a high length to girth ratio—it is more difficult for you to gain girth than length. This is unfortunate, because what you need is girth. And if you have a chode that is in need of length, you will unfortunately be more more adept at gaining girth than your much-needed length.
I haven’t looked at any numbers on this, just a few I’ve noticed in people’s signatures. So if anyone with a disproportionately long and thin or short and fat wang can chime in and share their experiences, that would be helpful. And if anyone has been enterprising enough to compile the PE Database’s numbers into some useful format that could look for people with wangs that have either a really high ratio (like 8 to 5), or a really low ratio (like 1:1) and see how their gains have been, that would easily show us whether there is anything to my theory.