Interesting! Hmm.. I've know a good amount of white women to complain about slow growth actually; and over time I could see that their growth was indeed slower than average. However, they would usually just maintain a healthy SL cut..(or a short cut).they didn't have much breakage unless they were over bleaching so they retained what they had easily. I think we often assume all WP have fast growing hair when in actually they're just retaining what they have really well.