Michael: There's an excellent chance you got past slush. A number of others I talk to are in the same boat as you, and at least one recently received an answer to a query, stating that they're beginning to buy out of the slush for the next issue. So, hopefully, soon.
goldmund: It can be quite a while. However, there's no reason for you to withdraw from the other market(s), as long as they're anywhere near Bull Spec's quality. Just be sure to notify the others right away when you get an acceptance from one of them.