How many Marvel characters absolutely have to be tied to a particular time period? As noted by many posters, Magneto could be a survivor of ethnic cleansing in Yugoslavia, Ben Grimm could be a Gulf War I vet, etc. I've never had a problem with the sliding time scale. Hell, if we're REALLY worried about continuity, then how does Peter Parker even have time to sleep, given that he's appeared in 5 comics a month for the last 40 years? He's battled what, over 1,000 different villains, most of them 20 times or more? He'd have to have been in two places at once, most of that time. I just suspend my disbelief, and enjoy the stories. What bugs me is not "sliding time scales", it's super-heroes behaving out of character. Yes, I'm looking at you, Bendis.