ETA: And if y'all really want to get technical, swang or flow is not characteristic of type 4 or maybe even some type 3's naturally. You have to manipulate the hair to do it. So why get up in arms and say why it gotta be white girl swang or like a white girl. Why can't it be black girl swang? Have you ever seen an afro swing? NAPS DON'T SWING. That is something that is characteristic of other "types" of hair that we cannot not acheive naturally. We have to do something to get our hair to do it whether it's braid, blow dry, relax, roller set, etc. I don't take issue with the like a "white girl" part of the comment. I do agree that that chick was ignorant though.
I had the swang even when I was natural and I am a 4a. It really depends on the type of hair, mine was thick so I had swang even though my hair was braided and full of Vaseline.