Is it possible to set a slider prompt to a default value? It seems it can only default to one end of the range or not with sorting, but how about actually setting the default value? I've tried with a dashboard prompt but this just takes away the slider completely and sets the graph to one value.
Since a section slider is a part of th view rendering it comes down to "in which sequence do the dimension members arrive in the view for rendering". So basically: No, there's no way of defaulting the position apart from sort order.