I have wondered if looser or White curlies use two strand aka
kinky twists too. Twists and twist outs look good on any type of
curl I imagine, they are good for protective styling (keeping
your hand out of your head, preventing breakage and just letting
your hair grow) more people should try them. Plus the resulting
twist out gives you a cool look. And twists and braids can be a
good style to blend relaxed and natural hair during a transition
or give curls to heat damaged curls.
http://tightlycurly.com/GrowItOut.aspx  There are two examples
of looser curlies who use this style: EmpressRi's channel:  Teri
of tightlycurly.com and she has long hair down her back. I
imagine twists on long hair can take longer definitely, depends
on if you have the patience:  My Fotki