An uninformed observer might think that the best thing comics could do from a marketing standpoint is to be as hip and trendy as possible. The Silver Age of Comics taught us that this is a really bad idea:
I've picked on Swingin' with Scooter before, partly because the name of the book is Swingin' with Scooter. I strongly suspect this is where Mike Myers got the idea for his "Austin Powers" character, but I suppose that's between him and DC.
What really doesn't work is Superman using slang. I know he's supposed to be under thirty years of age, but he has always looked like a guy knocking on fifty. And he's a dweeb. Seriously, why do you think he has any foes at all? Who in their right mind would want to tangle with someone who can fly into outer space and lift a skyscraper with his bare hands? Superman's personality is so abrasive that even his incredible power can't keep people from wanting to kick his ass. That, my friends, is a nerd. And using hip language only makes it worse.
And we can see the influence of the awful Adam West Batman television series that validated everyone's claim that comics are stupid. The worst of this is that Robin starts saying "Holy (whatever)!" all the time:
Those of us older than 40 will remember decades of hiding our hobby from the jeers and cruel taunts of non-fanboys. We suffered a lot for you kids. And you're welcome.
Hey! It's time for Fun with Out of Context Dialogue!(tm!):
That's right! You can't put one over on Roy Raymond, with your spaghetti-filled table legs and... stuff.
See you tomorrow!