I have low porosity hair too. When my hair's soaked down in the shower to get it completely wet (which takes a bit of effort b/c I'm lo-po) I squeeze some of the water out and then apply gobs of conditioner to my hair just smoothing it on. Then I'll let it settle for a bit while I am showering and the hair soaks in the conditioner, from the warmth and steam from the shower. When I'm done I don't end up needing to rinse any out, I just smooth my hand down and the excess water/conditioner comes out and then it's time for gel when I get out.
They describe this technique in the CG book pretty well in the Type 4 chapter, but it took me a while to figure out how to make it work b/c scrunching is for looser curl patterns and tighter curls do better with smoothing. Once I figured that out it was fine.
I have tried the Tightly Curly Method, too. They really are not that different. However a person decides to smooth their hair is just an option, you don't have to do every single curl like Teri does. Some ppl's hair don't need all that to get it defined if their moisture levels are on point. But she has a lot of hair so I get why that works for her. If she used gel, she wouldn't have to do all that though...imo.
I like to take tips from a few different curly hair books/methods and just make my own method. Between Lorraine, Terri, Dickey, and Ouidad, I think I've pretty much figured everything out
and what's funny is that their approaches all have much more similarities than differences.