You were wrong as well, you know. You thought Niji could use invisibility, Queen confirmed it's just Stealth Black's thing. And why tagging nik87 when he too thought Sanji used invisibility ? This isn't a Zoro vs Sanji thread so no reason to ask for a pat on the back from other Zoro fans.
That being said, yes, Sanji didn't turn invisible, I was wrong about that and I can admit without feeling any shame. And I want to add that I apologize for having been to categorical about this whole thing, the way Oda drew Sanji disappearing made me genuinely think there was no way it could be super speed. Last chapter made it clear it was super speed because Oda drew speed lines instead of this weird effect resembling water evaporation in chapter 1031 (that and characters saying it clearly, of course).