DD,
If you ask this question to 50 Crappie fishermen you're bound to get 50 different answers. I have had good nights during all moon phases so personally I don't think that it really matters. I know people who will NEVER fish on a full moon no matter how good of a bit you tell them you're on. Another thing to think of is minnows vs. shad, that could have been the difference especially if you had small minnows.