Originally Posted by uki1234

"he says: "It's been nice or somethin like that, that's when Goku makes his quote about Gohan's power. Cell then goes on to say "goodbye""

Aren't we discussing manga, not anime?

I was jk about weed

What Goku said happened during the kamehameha duel, before Vegeta's distraction, in time when Cell's and Gohan's kamehameha were on about same level.

So if Cell's kamehameha = Gohan's kamehameha, and Gohan hasn't released his true power yet, that makes him stronger.