Anyone who looks at the Celestion website or the back of the fucking speaker "can't accept it" because that's not what Celestion says. They say 20W.
Now, I know Jim's uncle knew a guy who used to work for Celestion who totally didn't leave under suspicious circumstances, and he talked to a guy who says it's 25W. But the actual fucking speaker says 20W. There's a serious difference in quality of evidence here. That is not proof, just bullshit. The spec sheet is proof.
If Celestion wants this to go away, all they have to do is change their website and the sticker and warranty it at 25W and boom, problem gone. Similarly, Celestion will do custom stickers. If they really are 25W Fender could order them with the correct sticker. The fact that they have not done either, despite this being discussed for years, makes it quite clear what their position is.