I suppose this a question to hang on to for if Millar ever offers a Net chat interview or something similar. I can't see Nightcrawler being 14. He moves around too freely. Even if he is a German citizen illegally in the US after his Weapon X capture, I would have to think that once he came to SHIELD's attention, they'd help him get home to his family. Either at the end of the Weapon X arc, or after the Return of the King arc. Also, even though I have no doubts that the German educational system is superior to the American one, he just seems too intelligent for a 14-year old. Same with Beast being 17. His brain isn't part of his mutation... well, until that time in 616 where he could trade brain power in for brawn to become a stronger, fiercer, but stupider Beast. He tinkers with the Blackbird like it's a remote control car, constructs the Danger Room (both the holo version and the real one), the list goes on. Unlike Jean and Xavier, he doesn't have the option of using other peoples' minds to supplement his own knowledge, and so I would really have to put him at mid 20s. He is a very introverted person, definitely socially stunted, and that's why he dated someone who was probably a half decade his junior... they were on the same level... well, not mentally, but perhaps socially is the word I'm looking for?