My stuff met the board last september, and I was asking the same question then. I was also sponsored by a reserve unit. The squardron commander told me that sponsorship helps a huge deal, but there is always a chance they will deny you. It depends on whether the unit has the money to put you through training, or if they've put more people up to the board than they have the money to train with. Also, your package does play a little bit of a role in the decision.
good luck