Nice find! Turnaround-B's can also be executed in a simpler (if more difficult) way. Flick the control stick in the direction you want to turn, let it return to neutral, and press B immediately afterward. Alternately, if you press the control stick very slightly in the direction you want to turn and press B, you'll do a turnaround-B with neutral-B instead of side-B.
It takes time to learn the execution, but it's applicable to every character in the game and quite useful.
You can also do a b-reverse by pressing the control stick in the opposite direction immediately after pressing B. This changes the direction you're facing and instantly flips your horizontal momentum.
A wavebounce is a combination of a turnaround-B and a B-reverse. Flick the stick backwards, let it return to neutral, immediately press b, immediately press the stick forwards. The end result is flipping your horizontal momentum without changing the direction you're facing.
You can perform all of these with up-B, side-B, and down-B as well. Up- and down- are obviously not too useful with WFT as they aren't really affected by WFT's facing.
I haven't found much use with WFT's b-reverse or wavebounce, but I'm also not great at executing them. I use turnaround-B's a lot, and WFT can use them to great effect too. I guess it's also possible that some of her specials can't be turned around, reversed, or wavebounced. Should spend some time in the lab real quick to verify.
A more detailed breakdown can be found here:
http://smashboards.com/threads/turnaround-bs-b-reverses-and-wavebounces-know-the-difference.334389/.