Yeah, that's why I consider the DE IRG a good fix if you run out of Too Shea
and don't want to have some overnighted, but not cost effective for daily, regular use. The NG APRT does require a good bit of condish too, and I did notice it detangled a little better than the DE IRG did (since the DE is so thick).
I have had protein problems before, but usually it's with products left in my hair (a leave-in was particularly bad). I've only had a handful of protein problems with rinse out products (like Tresemme Anti-Breakage conditioner). So I'm not super-prone to protein issues, but I'm not immune either. For someone super protein-sensitive, it's not the best choice except for the occasional special occasion hair.