It's TOTALLY not true for my hair. I do always follow with a cold distilled water rinse though, so maybe that has something to do with it in my case. Although it could also be the sheer volume of hair I have. I definitely absorb easily, and all my porosity tests have pointed to high porosity mostly due to coloring. Maybe it's time to retest.
eta I just retested and am changing my porosity to normal to high. Most of the hair other than where I have left over highlights has normal. If it weren't for the highlights it would all be normal. Which explains why my hair holds water so well if coupled with the amount I have.