The Japanese word they used can also mean "challenge" or "to come close to/closing in upon". "Gohan showed power that challenges Goku/Gohan showed power that closes in on Goku/etc etc." Regardless, it shows the Animedia magazine preview wasn't incorrect.
I am not sure I would call that brief exchange "power that challenges Goku/Gohan showed power that closes in on Goku/etc etc", but that is just my opinion on the matter.