When did he say that? But just because he said it doesn't mean it's true. You never heard an expert be wrong before? They only things you provided were the definition of a spoiler, I know that that is, and it's not what is on the Crossfire. The movable wing is a wing by definition. What part of the definition of a wing does it not meet?

"Wings perform very efficiently, generating lots of down force for a small penalty in drag".
"The wing works by differentiating pressure on the top and bottom surface of the wing. What a wing does is make the air passing under it travel a larger distance than the air passing over it ".
it does because of the angle and the different thickness and the gap underneath. The air flows over the angled top at a different speed then the air flowing under, causing a differentiating pressure.

Again it might not be a perfect aerofoil, but it does have all the same properties. Making it a wing and not a spoiler.