The farm boy in the big city dynamic whenever Clark's early years are depicted seems like it wouldn't happen if he had spent 4 years at a big university in between. I've always assumed he's only high school educated (But because he's Superman, he knows a lot more than some people with PHDs, and can write on the level he needs to to be an ace reporter pretty easily- it's just that Lois is slightly better at it because of her experience in journalism and tough as nails instincts and investigative gumption. Remember that comic book where Clark, knowing nothing of medicine, quickly reads an entire medical library and performs surgery to save someone's life when the doctors don't think they can save her? I figure that Clark knows everything he needs to know, he just doesn't quite have Lois' instincts and skills in applied investigative journalism. Clark's main vocation is really to be Superman. Lois is first and foremost an investigative journalist.).