I think it's due to the fact that going natural has reintroduced alot of us to our true God given locks, and many are realizing that their hair has a curl pattern that they never knew or experienced. For some of us, this pattern is a looser curl than we thought we'd ever have. Some of us have kinky/ tight coils or "naps" (I don't mind this word- not to offend) which yet and still are springy and great.
I don't like to classify hair types into 3 and 4. I will do it occasionally so that others can understand that my hair and that of let's say, my child's, is different. Many of us on here have lovely
Afro-mix hair, which to me is kinky/coily. And we're proud of it. My girls Poohbear, Country Girl, and kristina are my natural inspirations, and they have gorgeous, lush afro hair doesn't happen to frame their face in loose, silky type 3 corkscrews.
There are a few of us that may cling to that 3c category. 3c is really the hardest to understand for me, for 3c and 4a are almost interchangable. But I'm happy with my hair, and I'm a sistah just like any of the rest of us, 2's, 3's,4's, or whateva.