Ok, since I don't have time to read everyone's post, I'll address this one because I disagree with it the most! LOL
1. I do think that blacks did evolve to generally have a different hair texture and growth rate due to the climate that we resided in. It's not a foolproof argument, but who needs WSL hair in the Serengeti???
2. Hair texture and hair growth (and/or retention) are indeed tied to one another. Trying to ignore this very obvious fact seems strange to me. On any given day how many Type 1-3 APLs do you see compared to Type 4bs?
I see nonBW and Type 1-3 women (of all races) with APL or longer hair all day long, it is not a challenge for them. They don't need an LHCF to help them learn to grow their hair.
Hair grows naturally and it is ludicrous to assume that we have to teach ourselves how to do something we can't control. All we can manipulate is retention (it's just fun right now for me to nag about growth rate). lol
If so many BW over the course of all history have had notably shorter hair than their nonBlack counterparts, then that points to a genetic predisposition for shorter hair.
I truly believe that Type 1s have stronger hair strands than Type 4bs and low hair types (Types 1-3, perhaps 4a too for laughs) also have quicker growth rates. I believe 4B hair is drier and more fragile than other types and this affects retention, compared to lower hair types that tend to have thicker, coarser strands of hair.
3. And the sample size is immense, I've seen this trend of quicker growing hair and better retention for all of my life (meaning every woman I have ever met).
4. And as a final bit of fun, I found an article that describes a hair texture gene that was identified last year. A mutation in this gene (P2RY5) supposedly leads to hair loss and "wooly" hair. When I looked at the pics, I thought the kids were just mixed, but I did find it strange that they didn't try to show that this "wooly" hair type is reminiscent of a common African hair type.
Link:
http://www.springerlink.com/content/d86406r5568w8u20/fulltext.pdf
At least now with one gene identified, a group could look to see if 4bs have that mutation or another one and then perhaps unethical, rich women with 4b hair could some day in the future get gene therapy instead of perms or design babies that lack the mutation. lol