No, depends on the context.
Kaidou didn't use FS, not even once against base/g2/g3. But once, Luffy went in G4: Snakeman, Kaidou countered it with speed+FS. So as long as Snakeman is used and got countered, it was FS. Otherwise, there is no FS.
I mean, this is also fine by me as we can assume...