Yes, I should have said he has proven himself "once again", this is nothing new. Your right that it's only the neck although at the end it seemed Sanji finished by lifting him as Queen is in the air. Still, a feat is a feat, him being able to propeller someone of Queen's size and in the manner he did is really just very impressive especially since it seemed to knock Perospero, someone generally considered to be high-veteran/low-YC tier unconscious.