There are some counties in PA that you can go in and wait. It all depends on the business process that the sheriff uses. I think most counties try to process applications at the end of the day. Before Christmas, I was buying a gun and the gun shop was telling people to purchase in the morning or early afternoon, because a mad rush on background checks at the end of the day.
Right - my last CWP took like fifteen minutes but as you said, mine was in the morning.