It was. I have mixed feelings about it. I like the idea that Superman gritted out a difficult situation. I figure it was akin to Gladiator when Maximus won a duel while bleeding out. On the other hand, it kind of implies that Kryptonite doesn't really rob Superman of strength, ergo every time he's been stopped by Kryptonite prior some mentally tougher guy (like Batman!) would've succeeded.
And like Gaius said, we're all trying to forget that movie.