I think this may turn into some sort of conspiracy theory about slightly out of focus photos.
It looks to me like a non-'grooved' wing or a Fake-grooved wing.
What the conspiracy theorists say is a 'groove' is the remains of go faster tape. If you look at the last photo, there is a sharp end on the 'groove', if it was a groove I'd expect to see a shadow, or a distorted reflection. Like the Nasa photos of the 'moon landings', where the shadows were wrong and reflection of a studio lamps in the visors!