Here is the post on CJ Marsha's blog that give you picture representation of texture Curl Junkie - Natural Hair Care for all types of Curly Hair!: My 2 cents on Protein/Texture/Porosity/Moisture Balance! :-)
Seeing examples, or pulling a hair out to compare may help you. Don't go by the float test for porosity, it's really unreliable. If you have some bumps, your hair probably isn't low porosity. Texture is more important then porosity, IMHO.
The only place I've read that low porosity hair and protein aren't compatible is on nc.com page about hair properties. That's why I never give that link to folks. The livecurlylivefree link is better.
My fine/low porosity LOVES protein. I do at least one PT a week and use a lot of products with protein.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me