Near Cincinnati, at my parents place the White Oak acorns are still green... I wouldn't expect to see anything dropping from it for at least another week or two. Today I saw plenty hickory nuts on the ground, walnuts are a little light right now (not sure if they are still up there or if it's just a bad year) and I haven't seen as much from the Pin Oak's as I would think.

Personally I think it might just be a little early to be worrying about the Mast crops right now, but it might be different in other parts of the state/states.