OK, I've got "Trees of Missouri," a book published by the Missouri Department of Conservation, and I quote...

"The red oak group is characterized by having acorns that take two years to mature. The acorns do not germinate until they have made it through winter with a moist, cold treatment."

The white oak group has acorns maturing at the end of their first growing season. The acorns do not need a cold treatment to germinate and usually sprout in late autumn...."