Hair that dries quickly is porous, not low porosity. The water sitting on your hair would indicate low porosity, but the quick drying time would be porous.
My hair isn't dense anymore (age and thyroid.) When I worked, I'd shower at 6, diffuse for a few minutes, not use any products and it the under layer would still be damp at 11:30.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me