It could be that you need to do it more often or leave it on longer. I like leaving IAgirl's PT for anywhere from a half hour to an hour; when I've done it for less, I can barely tell a difference. Granted, no matter what, it's not a drastic difference, but I can definitely see it if I leave it on for a while.
2b, fine texture, normal porosity & elasticity (CG as of 12/2011)

Low-poo: UFD Rich & Funky
Cowash: VO5 Kiwi Lime
RO: Tresemme Naturals, Aubrey Organics GPB, Ion Effective Care, MillCreek Keratin
PT/DT: IAgirl's PT, GVP CB
LI: KCKT, Cure Care, CJ CCCC Lite
Styling: Curl Keeper, As I Am Jelly, UFD Curly Magic, CJ Curl Queen, TIGI Strong Hold Mousse

^^ day 1 of going CG; avatar = 6 months later