The White-Gold Concordant was agreed to at the end of the war yes? Which was around twenty-five years prior to Skyrim, and the war started a few years before that. So my question is, given that certain characters speak as though they were there, what are their ages? The main two that bug me are Ulfric Stormcloak and Jarl Balgruuf. I can't imagine them being any older than their late forties, but even then, that would put them as being fairly young during the war.
If anyone knows something, or is willing to take a guess, that would be helpful.