Actually, you have the porosity thing reversed. Low porosity hair takes a LONG time to dry because the cuticle is "tight." Highly porous hair "gives up" moisture easily. So, your length should dry faster if it's porous and your roots slowly because they are low porosity.
The attributes of absorbing product are correct--your porous length absorbs quickly and it sits on your roots for a long time.
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