Thomas Shey
Legend
No, neither would I, which is why I think 12 pages of background material is probably too much. The DMG recommends two pages as a reasonable maximum, an that feels about right to me, depending on the formatting of the pages.
Even the last D&D game I ran (back in the 3e era) had a heck of a lot more than that, just so the nationalities and religions were clear. It probably makes a difference whether you're running in an original setting or not.