Nope. Disney is pretty tight-lipped about it -- and if I'm not mistaken, the actual number of prizes given out in any given day are completely random.
I can tell you that the number of prizes awarded in any given day has nothing to do with projected park attendance figures (i.e. Disney does not give out fewer prizes on low-attendance days and more prizes on heavily attended days).
It's all about being in the right place at the right time.