well if it was consistent, it wouldn't be a "sliding scale." y'know? it'd just be a timeline. which would work.
I don't think the JSA is as much of a problem as it used to be, considering 90% of the originals are dead. They're not really a good example anymore. The few originals that are alive all have sufficient explanations in place for not being as old as they should.
but Black Canary related, at her current age, she could be the granddaughter of the original in a set timeline and still be the same age. course she did take a dip in a Lazarus Pit recently. (which is in the article)
I don't know if Cap. America is as much a problem for Marvel as much as things like say, Reed Richards and Ben Grimm fighting in WW2, or Tony Stark being in Vietnam, and those things constantly having to be revised/rewritten/reconfigured, etc.
the whole thing just becomes really silly after a while when some characters age and others don't. ala the original Teen Titans as compared to their mentors.
