I diffuse for 5 minutes or so - just long enough to develop some root curl and dry the undersurface a bit. It generally will take an hour or so after that to air dry. I have found that since I started highlighting my hair a year ago (3 - 4 time/yr) that my hair dries faster. It's obviously not as low porosity as it was before I started highlights. On the other hand, the grays blend better!
2Poodles Southeast PA
fine, med porosity, normal elasticity
Currently using the following 2 - 3 x/week:
Living Proof Perfect Hair Day suphate-free Poo, cone-free CO and styling treatment, plus KCCC