Nope. Porosity is often dependent of the level of damage to your hair. For example, people who lighten and/or straighten frequently would tend to have higher porosity hair. Remember that there is also a difference between texture (fine, coarse) and density (thick, thin). For example, I have a ton of hair (thick density), but the individual strands tend to be fine (texture). Texture and porosity are the two properties that make the biggest difference in picking the right products.

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3a/f/iii
Modified CG since 11/5/11
CLEANSE: VO5 Vanilla Mint Tea Clarifying, DevaCare No-Poo, CHS Treatment Shampoo
RO: DevaCare One Condition, SS Caitlin's Conditioner, Mop Top Daily Conditioner
LI: SS Repairing Protein Treatment, CHS Silk Leave-In
STYLE: Re:Coil, Curl Keeper, Deva Ultra Defining Gel, Curls Rock Amplifier and Strong Hold Mousse, Sweet Curls Elixirs Okra Gel and Hard Hold Gel, SS Curl Enhancing Jelly and Firm Hold Gel