I too think there seems to something in this: I have a couple of thin corkscrews that usually never clump. The only way to get them to clump is to "turn" their direction when wet - this seems to "open them" up. I don't mind the thinner curls in terms of how they look, but I don't like one of them because its impractical - it frames my face but tends to sort of fall into my face, and it's hard to keep it away because it won't pair up with other curls. Hm, difficult to describe.
I also have one spot were I get a weird clump - two or three curls with a larger curl diameter sort of curling into each other, resulting in a very odd curl shape. Luckily this one is mostly hidden by the hair on top.
3a; med-coarse; ii; med or high porosity (or a mix); med elasticity
Wash: CJ DFCC, low-poo (varies).
Conditioner: CJAO, CJ Smoothing Daily Conditioner, Fructis Triple Nutrition.
DT: CJ Curl Rehab.
Styling: CJ CCCC-lite, Komaza Coconut Lotion, Komaza Coconut Pudding, BRHG, MGA SRSG.
Tools: curlease towel, wide toothed plastic comb, Braun Satin Pro Diffuser.
Experimenting with: CJ CIAB, Fuzzy Duck Gel
Current HG: CJ CCCC-lite+BRHG